clinic vs session

clinic and session both are nouns.

Word	Noun	Adjective	Verb	Adverb
clinic	Yes	No	No	No
session	Yes	No	No	No

As nouns, session is a hypernym of clinic; that is, session is a word with a broader meaning than clinic:

clinic: meeting for diagnosis of problems and instruction or remedial work in a particular activity
session: a meeting for execution of a group's functions

clinic (noun)	session (noun)
a healthcare facility for outpatient care	a meeting devoted to a particular activity
meeting for diagnosis of problems and instruction or remedial work in a particular activity	a meeting for execution of a group's functions
a medical establishment run by a group of medical specialists	a meeting of spiritualists
	the time during which a school holds classes