worm vs worm gear

worm and worm gear both are nouns.

Word	Noun	Adjective	Verb	Adverb
worm	Yes	No	Yes	No
worm gear	Yes	No	No	No

worm (noun)	worm gear (noun)
any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae	gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion
screw thread on a gear with the teeth of a worm wheel or rack
a software program capable of reproducing itself that can spread from one computer to the next over a network
a person who has a nasty or unethical character undeserving of respect

worm (verb)	worm gear (verb)
to move in a twisting or contorted motion, (especially when struggling)