trim back vs slash

trim back is not a noun while slash is a noun.

Word	Noun	Adjective	Verb	Adverb
trim back	No	No	Yes	No
slash	Yes	No	Yes	No

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

trim back (noun)	slash (noun)
	a strong sweeping cut made with a sharp instrument
	a punctuation mark (/) used to separate related items of information
	an open tract of land in a forest that is strewn with debris from logging (or fire or wind)
	a wound made by cutting

trim back (verb)	slash (verb)
cut down on; make a reduction in	cut drastically
	cut open
	cut with sweeping strokes; as with an ax or machete
	beat severely with a whip or rod
	move or stir about violently