snack food vs crisp

snack food and crisp both are nouns.

Word	Noun	Adjective	Verb	Adverb
snack food	Yes	No	No	No
crisp	Yes	Yes	Yes	No

As nouns, crisp is a hyponym of snack food; that is, crisp is a word with a more specific, narrower meaning than snack food:

snack food (noun)	crisp (noun)
food for light meals or for eating between meals	a thin crisp slice of potato fried in deep fat

snack food (adjective)	crisp (adjective)
	pleasantly cold and invigorating
	brief and to the point; effectively cut short
	(of hair) in small tight curls
	(of something seen or heard) clearly defined
	pleasingly firm and fresh
	tender and brittle

snack food (verb)	crisp (verb)
	make brown and crisp by heating
	make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic