woodscrew vs screw eye

woodscrew and screw eye both are nouns.

Word	Noun	Adjective	Verb	Adverb
woodscrew	Yes	No	No	No
screw eye	Yes	No	No	No

As nouns, screw eye is a hyponym of woodscrew; that is, screw eye is a word with a more specific, narrower meaning than woodscrew:

woodscrew: a metal screw that tapers to a point so that it can be driven into wood with a screwdriver
screw eye: a woodscrew having its shank bent into a ring

Other hyponyms of woodscrew include lag bolt, lag screw.

woodscrew (noun)	screw eye (noun)
a metal screw that tapers to a point so that it can be driven into wood with a screwdriver	a woodscrew having its shank bent into a ring