cut back vs confine to

cut back and confine to both are verbs.

Word	Noun	Adjective	Verb	Adverb
cut back	No	No	Yes	No
confine to	No	No	Yes	No

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

Other hypernyms of cut back include circumscribe, limit.

cut back (verb)	confine to (verb)
place restrictions on	restrict or confine within limits
cut down on; make a reduction in
cultivate, tend, and cut back the growth of
return in time