pollard vs cut back

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

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

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

Other hypernyms of pollard include clip, crop, dress, lop, prune, snip, trim.

pollard (noun)	cut back (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

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