rear vs set up

rear is a noun but set up is not a noun.

Word	Noun	Adjective	Verb	Adverb
rear	Yes	Yes	Yes	No
set up	No	No	Yes	No

As verbs, rear and set up are synonyms defined as:

Other synonyms of rear include erect, put up, raise.

As verbs, set up is a hyponym of rear; that is, set up is a word with a more specific, narrower meaning than rear:

Other hyponyms of rear include pitch, cock up, prick, prick up.

rear (noun)	set up (noun)
the side that goes last or is not normally seen
the fleshy part of the human body that you sit on
the back of a military formation or procession
the side of an object that is opposite its front
the part of something that is furthest from the normal viewer

rear (adjective)	set up (adjective)
located in or toward the back or rear

rear (verb)	set up (verb)
construct, build, or erect	get ready for a particular purpose or event
stand up on the hind legs, of quadrupeds	make ready or suitable or equip in advance for a particular purpose or for some use, event, etc
cause to rise up	equip with sails or masts
look after a child until it is an adult	arrange thoughts, ideas, temporal events
rise up	put into a proper or systematic order
	erect and fasten
	set up for use
	place
	create by putting components or members together
	construct, build, or erect
	begin, or enable someone else to begin, a venture by providing the means, logistics, etc.
	produce
	take or catch as if in a snare or trap
	arrange the outcome of by means of deceit
	set up or found