unwind vs unstrain

unwind and unstrain both are verbs.

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

As verbs, unwind and unstrain are synonyms defined as:

Other synonyms of unwind include loosen up, make relaxed, relax, unlax.

unwind (verb)	unstrain (verb)
become less tense, rest, or take one's ease	cause to feel relaxed
cause to feel relaxed
separate the tangles of
reverse the winding or twisting of