wriggle vs writhe

wriggle is a noun but writhe is not a noun.

Word	Noun	Adjective	Verb	Adverb
wriggle	Yes	No	Yes	No
writhe	No	No	Yes	No

As verbs, wriggle and writhe are synonyms defined as:

wriggle and writhe: to move in a twisting or contorted motion, (especially when struggling)

Other synonyms of wriggle include squirm, twist, worm, wrestle.

wriggle (noun)	writhe (noun)
the act of wiggling

wriggle (verb)	writhe (verb)
to move in a twisting or contorted motion, (especially when struggling)	to move in a twisting or contorted motion, (especially when struggling)