cranny vs impression

cranny and impression both are nouns.

Word	Noun	Adjective	Verb	Adverb
cranny	Yes	No	No	No
impression	Yes	No	No	No

As nouns, impression is a hypernym of cranny; that is, impression is a word with a broader meaning than cranny:

Other hypernyms of cranny include depression, imprint.

cranny (noun)	impression (noun)
a small opening or crevice (especially in a rock face or wall)	an impressionistic portrayal of a person
a long narrow depression in a surface	the act of pressing one thing on or into the surface of another
	(dentistry) an imprint of the teeth and gums in wax or plaster
	an outward appearance
	a vague idea in which some confidence is placed
	a clear and telling mental image
	a symbol that is the result of printing or engraving
	all the copies of a work printed at one time
	a concavity in a surface produced by pressing