cut vs trim back

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

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

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

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

cut (noun)	trim back (noun)
the act of shortening something by chopping off the ends
the act of cutting something into parts
the act of penetrating or opening open with a sharp edge
a refusal to recognize someone you know
the act of reducing the amount or number
an unexcused absence from class
in baseball; a batter's attempt to hit a pitched ball
(sports) a stroke that puts reverse spin on the ball
the division of a deck of cards before dealing
a trench resembling a furrow that was made by erosion or excavation
a canal made by erosion or excavation
the style in which a garment is cut
(film) an immediate transition from one shot to the next
the omission that is made when an editorial change shortens a written passage
a remark capable of wounding mentally
a distinct selection of music from a recording or a compact disc
a piece of meat that has been cut from an animal carcass
a share of the profits
a wound made by cutting
a step on some scale

cut (adjective)	trim back (adjective)
separated into parts or laid open or penetrated with a sharp edge or instrument
(of pages of a book) having the folds of the leaves trimmed or slit
fashioned or shaped by cutting
(used of grass or vegetation) cut down with a hand implement or machine
made neat and tidy by trimming
with parts removed
(of a male animal) having the testicles removed
(used of rates or prices) reduced usually sharply
mixed with water

cut (verb)	trim back (verb)
cut off the testicles (of male animals such as horses)	cut down on; make a reduction in
have grow through the gums
grow through the gums
cease, stop
weed out unwanted or unnecessary things
lessen the strength or flavor of a solution or mixture
cut down on; make a reduction in
cut and assemble the components of
reduce in scope while retaining essential elements
have a reducing effect
shorten as if by severing the edges or ends of
dissolve by breaking down the fat of
make out and issue
refuse to acknowledge
separate with or as if with an instrument
divide a deck of cards at random into two parts to make selection difficult
hit (a ball) with a spin so that it turns in the opposite direction
cause to stop operating by disengaging a switch
make an incision or separation
allow incision or separation
function as a cutting instrument
fell by sawing; hew
penetrate injuriously
reap or harvest
style and tailor in a certain fashion
form by probing, penetrating, or digging
record a performance on (a medium)
make a recording of
create by duplicating data
form or shape by cutting or incising
perform or carry out
stop filming
make an abrupt change of image or sound
turn sharply; change direction abruptly
pass through or across
pass directly and often in haste
move (one's fist)
give the appearance or impression of
be able to manage or manage successfully
discharge from a group
intentionally fail to attend