turn back vs modify

turn back and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
turn back	No	No	Yes	No
modify	No	No	Yes	No

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

Other hypernyms of turn back include alter, change.

turn back (verb)	modify (verb)
go back to a previous state	make less severe or harsh or extreme
turn inside out or upside down	add a modifier to a constituent
hold back, as of a danger or an enemy; check the expansion or influence of	cause to change; make different; cause a transformation
retrace one's course
force to go away; used both with concrete and metaphoric meanings