stand up vs stand back

stand up and stand back both are verbs.

Word	Noun	Adjective	Verb	Adverb
stand up	No	No	Yes	No
stand back	No	No	Yes	No

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

Other hyponyms of stand up include ramp, line up, queue, queue up.

stand up (verb)	stand back (verb)
defend against attack or criticism	stand away from an object or person
refuse to back down; remain solid under criticism or attack	stay clear of, avoid
be standing; be upright
put into an upright position
rise to one's feet
rise up as in fear
resist or withstand wear, criticism, etc.