| Word | Definitions | Synonyms |
|---|---|---|
| apse | (noun) a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar | Synonyms: apsis |
| apsidal | (adjective) of or relating to an apse | - |
| apsis | (noun) a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar | Synonyms: apse |