alveolus (n.)
- antrum
- apex
- armpit
- back
- basin
- blade
- bowl
- cavity
- concavity
- crater
- crypt
- cup
- dent
- depression
- dimple
- dint
- dip
- dorsum
- fold
- follicle
- furrow
- gouge
- hole
- hollow
- honeycomb
- impress
- impression
- imprint
- indent
- indentation
- indention
- indenture
- lacuna
- larynx
- lips
- notch
- palate
- pharynx
- pit
- pock
- pockmark
- scoop
- shell
- sink
- sinus
- socket
- syrinx
- teeth
- tip
- tongue
- trough
- velum
