Apse and Transept

Apse noun - A domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar.

Transept and apse are semantically related. In some cases you can replace term "Transept" with "Apse", this nouns are similar.

Transept noun - Structure forming the transverse part of a cruciform church; crosses the nave at right angles.

Apse and transept are semantically related. Sometimes you can replace term "Apse" with "Transept", this nouns are similar.