loosen up vs relax

loosen up and relax both are verbs.

Word	Noun	Adjective	Verb	Adverb
loosen up	No	No	Yes	No
relax	No	No	Yes	No

As verbs, loosen up and relax are synonyms defined as:

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

As verbs, loosen up and relax are synonyms defined as:

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

As verbs, loosen up and relax are synonyms defined as:

loosen up and relax: become less tense, less formal, or less restrained, and assume a friendlier manner

loosen up (verb)	relax (verb)
become less tense, rest, or take one's ease	become less tense, rest, or take one's ease
cause to feel relaxed	cause to feel relaxed
make one's body limber or suppler by stretching, as if to prepare for strenuous physical activity	make less taut
cause to become unblocked	become loose or looser or less tight
become less tense, less formal, or less restrained, and assume a friendlier manner	make less active or fast
	become less severe or strict
	make less severe or strict
	become less tense, less formal, or less restrained, and assume a friendlier manner