shelve vs set back

shelve and set back both are verbs.

Word	Noun	Adjective	Verb	Adverb
shelve	No	No	Yes	No
set back	No	No	Yes	No

As verbs, shelve and set back are synonyms defined as:

Other synonyms of shelve include defer, hold over, postpone, prorogue, put off, put over, remit, table.

shelve (verb)	set back (verb)
place on a shelf	slow down the progress of; hinder
hold back to a later time	cost a certain amount
	hold back to a later time