clinic vs medical institution

clinic and medical institution both are nouns.

Word	Noun	Adjective	Verb	Adverb
clinic	Yes	No	No	No
medical institution	Yes	No	No	No

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

clinic (noun)	medical institution (noun)
a healthcare facility for outpatient care	an institution created for the practice of medicine
meeting for diagnosis of problems and instruction or remedial work in a particular activity
a medical establishment run by a group of medical specialists