better vs upgrade

better and upgrade both are nouns.

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

As verbs, upgrade is a hyponym of better; that is, upgrade is a word with a more specific, narrower meaning than better:

As verbs, upgrade is a hyponym of better; that is, upgrade is a word with a more specific, narrower meaning than better:

better (noun)	upgrade (noun)
something superior in quality or condition or effect	the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)
the superior one of two alternatives	hardware that provides better performance than an earlier version did
someone who bets	the property possessed by a slope or surface that rises
a superior person having claim to precedence	a reservation that is improved
	software that provides better performance than an earlier version did
	an upward slope or grade (as in a road)

better (adjective)	upgrade (adjective)
(comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another
(comparative of `good') changed for the better in health or fitness
(comparative and superlative of `well') wiser or more advantageous and hence advisable
more than half

better (verb)	upgrade (verb)
get better	to improve what was old or outdated
to make better	give better travel conditions to
surpass in excellence	get better travel conditions
	rate higher; raise in value or esteem
	give a promotion to or assign to a higher position

better (adverb)	upgrade (adverb)
comparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc.
from a position of superiority or authority