spill vs trim back

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

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

As verbs, trim back is a hypernym of spill; that is, trim back is a word with a broader meaning than spill:

Other hypernyms of spill include bring down, cut, cut back, cut down, reduce, trim, trim down.

spill (noun)	trim back (noun)
the act of allowing a fluid to escape
a sudden drop from an upright position
a channel that carries excess water over or around a dam or other obstruction
liquid that is spilled

spill (verb)	trim back (verb)
reduce the pressure of wind on (a sail)	cut down on; make a reduction in
reveal information
cause or allow (a solid substance) to flow or run out or over
pour out in drops or small quantities or as if in drops or small quantities
cause or allow (a liquid substance) to run or flow from a container
flow, run or fall out and become lost