30 Synonyms of Cavity with Example and Explanation 2026

The word cavity refers to a hollow space within a solid object, often naturally occurring or formed by decay.

Imagine biting into an apple and noticing a small hollow spot inside — that’s a cavity. It’s commonly used in medical, dental, geological, and scientific contexts, such as talking about tooth cavities, cavities in rocks, or empty spaces in materials.

Learning synonyms for cavity is important for English learners and writers because it allows you to describe empty spaces with precision, enrich your vocabulary, and avoid repetitive writing.

This article explores the meaning of cavity, its pronunciation, history, connotations, and 30 powerful synonyms with examples, helping you improve your English communication skills.

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Meaning of Cavity

Definition
Cavity (noun): A hollow space or empty area within a solid object.

Examples:

• The dentist treated a cavity in my molar.
• The rock had a natural cavity filled with crystals.

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Connotative Meaning

• Positive tone: Useful for describing natural formations like geodes or pockets
• Negative tone: Decay, damage, hole in a tooth
• Neutral tone: Empty space, hollow, void

(Connotation: the emotional or cultural meaning attached to a word beyond its dictionary definition.)

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Etymology

• Origin: Latin cavitas, meaning “hollowness” or “empty space”
• History:
  • Old English (450–1100): Limited usage of native terms for hollow spaces
  • Middle English (1100–1500): Borrowed from Latin through French influence
  • Modern English (1500–Present): Commonly used in medical and geological contexts

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Pronunciation (US & UK – IPA)

• US: /ˈkæv.ə.ti/
• UK: /ˈkæv.ɪ.ti/

Syllables: cav-i-ty

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Affixation Pattern of Cavity

• Root: cav
• Prefix: none
• Suffix: -ity
• Word formation: Forms nouns (cavity), adjectives (cavitary), and compounds (dental cavity)

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Synonyms of Cavity

Here are 30 synonyms with pronunciation and examples:

1. Hollow (noun) — US /ˈhɑː.loʊ/ | UK /ˈhɒl.əʊ/

Meaning: An empty space inside something
Examples:

• The tree had a hollow at its base.
• He found a hollow in the wall.

2. Gap (noun) — US /ɡæp/ | UK /ɡæp/

Meaning: An opening or empty space between objects
Examples:

• There was a gap in the fence.
• A gap in her knowledge became apparent.

3. Opening (noun) — US /ˈoʊ.pən.ɪŋ/ | UK /ˈəʊ.pən.ɪŋ/

Meaning: A space or hole allowing entry
Examples:

• The opening in the cave was narrow.
• He noticed an opening in the ceiling.

4. Void (noun) — US /vɔɪd/ | UK /vɔɪd/

Meaning: An empty space or vacuum
Examples:

• The spacecraft drifted into the void of space.
• He felt a void after moving away from home.

5. Depression (noun) — US /dɪˈprɛʃ.ən/ | UK /dɪˈprɛʃ.ən/

Meaning: A sunken or hollow area
Examples:

• The ground had a depression from the fallen tree.
• There was a small depression on the surface of the metal.

6. Pit (noun) — US /pɪt/ | UK /pɪt/

Meaning: A small hollow or indentation
Examples:

• The peach had a pit in the center.
• The road was full of pits after the storm.

7. Hole (noun) — US /hoʊl/ | UK /həʊl/

Meaning: An opening or empty space in a surface
Examples:

• The wall had a hole where the picture fell.
• He dug a hole in the sand.

8. Socket (noun) — US /ˈsɑː.kɪt/ | UK /ˈsɒk.ɪt/

Meaning: A hollow into which something fits
Examples:

• The light bulb fit snugly into its socket.
• The tooth was missing from the socket.

9. Channel (noun) — US /ˈtʃæn.əl/ | UK /ˈtʃæn.əl/

Meaning: A groove or passage for flow
Examples:

• Water ran through a channel in the soil.
• The TV channel was temporarily unavailable.

10. Hollowed space (noun) — US /ˈhɑː.loʊd speɪs/ | UK /ˈhɒl.əʊd speɪs/

Meaning: A space made hollow inside
Examples:

• The tree trunk formed a hollowed space for birds.
• The cave had a hollowed space inside.

11. Crater (noun) — US /ˈkreɪ.tər/ | UK /ˈkreɪ.tər/

Meaning: A large hollow, often in the ground
Examples:

• The moon’s crater was visible through the telescope.
• A bomb left a deep crater in the field.

12. Recess (noun) — US /rɪˈsɛs/ | UK /rɪˈsɛs/

Meaning: A small hollow space or niche
Examples:

• There was a recess in the wall for decorations.
• The teeth had a recess in the enamel.

13. Alcove (noun) — US /ˈæl.koʊv/ | UK /ˈæl.kəʊv/

Meaning: A small recessed section of a room or area
Examples:

• The library had a reading alcove.
• She hid in an alcove behind the curtain.

14. Bore (noun) — US /bɔːr/ | UK /bɔː/

Meaning: A drilled or hollowed space
Examples:

• The carpenter made a bore in the wood.
• Oil was extracted from the bore in the ground.

15. Hollow cavity (noun) — US /ˈhɑː.loʊ ˈkæv.ə.ti/ | UK /ˈhɒl.əʊ ˈkæv.ɪ.ti/

Meaning: A completely empty space inside something
Examples:

• The skull has a hollow cavity for the brain.
• The rock had a hollow cavity full of air.

16. Dimple (noun) — US /ˈdɪm.pəl/ | UK /ˈdɪm.pəl/

Meaning: A small hollow or indentation, often on a surface
Examples:

• The apple had a dimple near the stem.
• Her cheek had a tiny dimple.

17. Slot (noun) — US /slɑːt/ | UK /slɒt/

Meaning: A narrow hollow or groove
Examples:

• The coin fit into the slot.
• He inserted the letter in the slot.

18. Depression cavity (noun) — US /dɪˈprɛʃən ˈkæv.ə.ti/ | UK /dɪˈprɛʃən ˈkæv.ɪ.ti/

Meaning: A hollow or sunken area
Examples:

• The tire left a depression cavity in the sand.
• The ice melted, leaving a depression cavity.

19. Niche (noun) — US /niːʃ/ | UK /niːʃ/

Meaning: A shallow hollow or recess in a wall
Examples:

• There was a niche for the statue.
• The plant thrived in the wall niche.

20. Socket cavity (noun) — US /ˈsɑː.kɪt ˈkæv.ə.ti/ | UK /ˈsɒk.ɪt ˈkæv.ɪ.ti/

Meaning: A hollow space designed to hold something
Examples:

• The light bulb fit in the socket cavity.
• The implant fits securely in the socket cavity.

21. Cranny (noun) — US /ˈkræ.ni/ | UK /ˈkræn.i/

Meaning: A small narrow space or crack
Examples:

• Dust collected in the cranny of the floorboard.
• A mouse escaped through a cranny.

22. Fissure (noun) — US /ˈfɪʃ.ɚ/ | UK /ˈfɪʃ.ər/

Meaning: A narrow opening or crack
Examples:

• Water seeped through the fissure in the rock.
• The cliff had a deep fissure.

23. Hole cavity (noun) — US /hoʊl ˈkæv.ə.ti/ | UK /həʊl ˈkæv.ɪ.ti/

Meaning: A hollow or perforated space
Examples:

• The tree trunk had a hole cavity for animals.
• The cheese had hole cavities throughout.

24. Hollow recess (noun) — US /ˈhɑː.loʊ rɪˈsɛs/ | UK /ˈhɒl.əʊ rɪˈsɛs/

Meaning: A small hollowed space inside
Examples:

• The castle had a hollow recess for storing weapons.
• She hid her diary in a hollow recess.

25. Pocket (noun) — US /ˈpɑː.kɪt/ | UK /ˈpɒk.ɪt/

Meaning: A small hollow or enclosed space
Examples:

• The snow had a pocket of ice underneath.
• The geologist found a pocket of minerals.

26. Hollow pit (noun) — US /ˈhɑː.loʊ pɪt/ | UK /ˈhɒl.əʊ pɪt/

Meaning: A deep empty space or depression
Examples:

• The ground had a hollow pit after excavation.
• The sand dune had a hollow pit in its center.

27. Concavity (noun) — US /ˌkɑːn.kəˈvɪ.ti/ | UK /ˌkɒn.kəˈvɪ.ti/

Meaning: The state of being hollowed inward
Examples:

• The concavity of the bowl held the liquid.
• The metal showed a concavity after pressing.

28. Hollow area (noun) — US /ˈhɑː.loʊ ˈer.i.ə/ | UK /ˈhɒl.əʊ ˈeə.ri.ə/

Meaning: A space inside something that is empty
Examples:

• The cave had a hollow area full of bats.
• The tree had a hollow area at its base.

29. Empty space (noun) — US /ˈɛmpti speɪs/ | UK /ˈɛmpti speɪs/

Meaning: A void or area with nothing inside
Examples:

• The box contained an empty space.
• There was an empty space in the wall.

30. Hollow nook (noun) — US /ˈhɑː.loʊ nʊk/ | UK /ˈhɒl.əʊ nʊk/

Meaning: A small hollow or cornered space
Examples:

• The kitten curled up in a hollow nook.
• Books were stored in a hollow nook on the shelf.

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Prototype Meaning

Cavity most commonly refers to a hollow or empty space inside a solid object. People usually imagine a hole, dent, or space that is recessed or enclosed, such as a tooth cavity, pit, or natural hollow.

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Prototype Categorization

• Dental/Medical: cavity, tooth cavity
• Geological/Natural: hollow, pit, crater, fissure
• Structural/Artificial: socket, niche, alcove
• Small Spaces: dimple, cranny, nook

Categorization helps writers select the most precise synonym depending on context and scale.

Antonyms: solid, filled, intact, unbroken

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Short Questions and Answers

• What does cavity mean?
  A hollow or empty space within a solid object.
• When should cavity be used?
  Use it to describe hollow areas in teeth, materials, or natural formations.
• Is cavity positive or negative?
  Depends on context: positive for natural hollows, negative for decay or damage.
• How is it different from similar words?
  “Cavity” is more formal and technical than “hole” or “gap,” often used in medicine, geology, or science.

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Conclusion

Learning cavity and its 30 synonyms helps you describe hollow spaces with precision. It strengthens your writing, avoids repetitive terms, and improves vocabulary for medical, scientific, or everyday contexts. Regular practice builds English confidence and makes descriptions more vivid and accurate.