unbend vs unwind

unbend and unwind both are verbs.

Word	Noun	Adjective	Verb	Adverb
unbend	No	No	Yes	No
unwind	No	No	Yes	No

As verbs, unwind is a hypernym of unbend; that is, unwind is a word with a broader meaning than unbend:

Other hypernyms of unbend include loosen up, make relaxed, relax, unlax, unstrain.

As verbs, unbend and unwind are synonyms defined as:

Other synonyms of unbend include decompress, loosen up, relax, slow down.

unbend (verb)	unwind (verb)
release from mental strain, tension, or formality	become less tense, rest, or take one's ease
become less tense, rest, or take one's ease	cause to feel relaxed
make less taut	separate the tangles of
free from flexure	reverse the winding or twisting of
unfasten, as a sail, from a spar or a stay
straighten up or out; make straight