snip vs cut back

snip is a noun but cut back is not a noun.

Word	Noun	Adjective	Verb	Adverb
snip	Yes	No	Yes	No
cut back	No	No	Yes	No

As verbs, snip and cut back are synonyms defined as:

Other synonyms of snip include clip, crop, dress, lop, prune, trim.

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

snip (verb)	cut back (verb)
cultivate, tend, and cut back the growth of	place restrictions on
sever or remove by pinching or snipping	cut down on; make a reduction in
	cultivate, tend, and cut back the growth of
	return in time