thin out vs trim

thin out is not a noun while trim is a noun.

Word	Noun	Adjective	Verb	Adverb
thin out	No	No	Yes	No
trim	Yes	Yes	Yes	No

As verbs, trim is a hypernym of thin out; that is, trim is a word with a broader meaning than thin out:

Other hypernyms of thin out include bring down, cut, cut back, cut down, reduce, trim back, trim down.

As verbs, trim is a hyponym of thin out; that is, trim is a word with a more specific, narrower meaning than thin out:

Other hyponyms of thin out include clip, crop, cut back, dress, lop, prune, snip.

thin out (noun)	trim (noun)
	cutting down to the desired size or shape
	a decoration or adornment typically on the edge of a garment
	attitude of an aircraft in flight when allowed to take its own orientation
	a state of arrangement or appearance

thin out (adjective)	trim (adjective)
	severely simple in line or design
	thin and fit
	characterized by order and neatness; free from disorder
	neat and smart in appearance

thin out (verb)	trim (verb)
make sparse	cut down on; make a reduction in
become sparser	adjust (sails on a ship) so that the wind is optimally used
lessen the strength or flavor of a solution or mixture	cut closely
	cultivate, tend, and cut back the growth of
	remove the edges from and cut down to the desired size
	decorate (food), as with parsley or other ornamental foods
	decorate, as with ornaments
	be in equilibrium during a flight
	balance in flight by regulating the control surfaces