wriggling vs writhing

wriggling and writhing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
wriggling	No	Yes	No	No
writhing	No	Yes	No	No

As adjectives, wriggling and writhing are synonyms defined as:

wriggling and writhing: moving in a twisting or snake-like or wormlike fashion

Other synonyms of wriggling include wiggly, wriggly.

wriggling (adjective)	writhing (adjective)
moving in a twisting or snake-like or wormlike fashion	moving in a twisting or snake-like or wormlike fashion