academic session vs school term

academic session and school term both are nouns.

Word	Noun	Adjective	Verb	Adverb
academic session	Yes	No	No	No
school term	Yes	No	No	No

As nouns, academic session and school term are synonyms defined as:

academic session and school term: the time during which a school holds classes

Other synonyms of academic session include academic term, session.

academic session (noun)	school term (noun)
the time during which a school holds classes	the time during which a school holds classes