raise vs upgrade

raise and upgrade both are nouns.

Word	Noun	Adjective	Verb	Adverb
raise	Yes	No	Yes	No
upgrade	Yes	No	Yes	No

As nouns, raise and upgrade are synonyms defined as:

Other synonyms of raise include acclivity, ascent, climb, rise.

As verbs, raise and upgrade are synonyms defined as:

Other synonyms of raise include advance, elevate, kick upstairs, promote.

raise (noun)	upgrade (noun)
the act of raising something	the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)
increasing the size of a bet (as in poker)	hardware that provides better performance than an earlier version did
the amount a salary is increased	the property possessed by a slope or surface that rises
an upward slope or grade (as in a road)	a reservation that is improved
	software that provides better performance than an earlier version did
	an upward slope or grade (as in a road)

raise (verb)	upgrade (verb)
cause to become alive again	to improve what was old or outdated
increase the level of	give better travel conditions to
raise the level or amount of something	get better travel conditions
raise in rank or condition	rate higher; raise in value or esteem
invigorate or heighten	give a promotion to or assign to a higher position
put an end to
bring (a surface or a design) into relief and cause to project
multiply (a number) by itself a specified number of times: 8 is 2 raised to the power 3
cause to be heard or known; express or utter
put forward for consideration or discussion
activate or stir up
establish radio communications with
pronounce (vowels) by bringing the tongue closer to the roof of the mouth
cause to assemble or enlist in military
bet more than the previous player
bid (one's partner's suit) at a higher level
summon into action or bring into existence, often as if by magic
construct, build, or erect
cultivate by growing, often involving improvements by means of agricultural techniques
create a disturbance, especially by making a great noise
call forth (emotions, feelings, and responses)
raise from a lower to a higher position
cause to puff up with a leaven
move upwards
collect funds for a specific purpose
look after a child until it is an adult
give a promotion to or assign to a higher position
register formally as a participant or member