cut back vs lop

cut back and lop both are verbs.

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

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

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

cut back (verb)	lop (verb)
place restrictions on	cultivate, tend, and cut back the growth of
cut down on; make a reduction in	cut off from a whole
cultivate, tend, and cut back the growth of
return in time