thin out vs snip

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

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

As verbs, snip is a hyponym of thin out; that is, snip 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, trim.

thin out (noun)	snip (noun)
	the act of clipping or snipping
	a small piece of anything (especially a piece that has been snipped off)

thin out (verb)	snip (verb)
make sparse	cultivate, tend, and cut back the growth of
become sparser	sever or remove by pinching or snipping
lessen the strength or flavor of a solution or mixture