flick-knife vs flick knife

flick-knife and flick knife both are nouns.

Word	Noun	Adjective	Verb	Adverb
flick-knife	Yes	No	No	No
flick knife	Yes	No	No	No

As nouns, flick-knife and flick knife are synonyms defined as:

flick-knife and flick knife: a pocketknife with a blade that springs open at the press of a button

Other synonyms of flick-knife include switchblade, switchblade knife.

flick-knife (noun)	flick knife (noun)
a pocketknife with a blade that springs open at the press of a button	a pocketknife with a blade that springs open at the press of a button