cut down vs trim back

cut down and trim back both are verbs.

Word	Noun	Adjective	Verb	Adverb
cut down	No	No	Yes	No
trim back	No	No	Yes	No

As verbs, cut down and trim back are synonyms defined as:

Other synonyms of cut down include bring down, cut, cut back, reduce, trim, trim down.

cut down (verb)	trim back (verb)
cut down on; make a reduction in	cut down on; make a reduction in
intercept (a player)
cause to come or go down
cut with a blade or mower
cause to fall by or as if by delivering a blow
cut with sweeping strokes; as with an ax or machete