cut back vs pollard

cut back is not a noun while pollard is a noun.

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

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

Other hyponyms of cut back include shear, poll, pinch, top, disbud.

cut back (noun)	pollard (noun)
	a usually horned animal that has either shed its horns or had them removed
	a tree with limbs cut back to promote a more bushy growth of foliage

cut back (verb)	pollard (verb)
place restrictions on	convert into a pollard
cut down on; make a reduction in
cultivate, tend, and cut back the growth of
return in time