upstage vs do by

upstage is a noun but do by is not a noun.

Word	Noun	Adjective	Verb	Adverb
upstage	Yes	Yes	Yes	Yes
do by	No	No	Yes	No

As verbs, do by is a hypernym of upstage; that is, do by is a word with a broader meaning than upstage:

Other hypernyms of upstage include handle, treat.

upstage (noun)	do by (noun)
the rear part of the stage

upstage (adjective)	do by (adjective)
of the back half of a stage
remote in manner

upstage (verb)	do by (verb)
steal the show, draw attention to oneself away from someone else	interact in a certain way
move upstage, forcing the other actors to turn away from the audience
treat snobbishly, put in one's place

upstage (adverb)	do by (adverb)
at or toward the rear of the stage