loose vs relax

loose is an adjective but relax is not an adjective.

Word	Noun	Adjective	Verb	Adverb
loose	No	Yes	Yes	Yes
relax	No	No	Yes	No

As verbs, loose and relax are synonyms defined as:

Other synonyms of loose include loosen.

As verbs, relax is a hyponym of loose; that is, relax is a word with a more specific, narrower meaning than loose:

Other hyponyms of loose include unbend, remit, slacken, slack, unscrew, unscrew.

loose (adjective)	relax (adjective)
not tight; not closely constrained or constricted or constricting
not compact or dense in structure or arrangement
not affixed
(of textures) full of small openings or gaps
not literal
lacking a sense of restraint or responsibility
not tense or taut
casual and unrestrained in sexual behavior
emptying easily or excessively
(of a ball in sport) not in the possession or control of any player
not officially recognized or controlled
not carefully arranged in a package
having escaped, especially from confinement

loose (verb)	relax (verb)
become loose or looser or less tight	become less tense, rest, or take one's ease
make loose or looser	cause to feel relaxed
turn loose or free from restraint	make less taut
grant freedom to; free from confinement	become loose or looser or less tight
	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

loose (adverb)	relax (adverb)
without restraint