switchblade knife vs flick knife

switchblade knife and flick knife both are nouns.

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

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

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

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

switchblade 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