upgrade vs grade

upgrade and grade both are nouns.

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

As nouns, grade is a hypernym of upgrade; that is, grade is a word with a broader meaning than upgrade:

As verbs, grade is a hypernym of upgrade; that is, grade is a word with a broader meaning than upgrade:

Other hypernyms of upgrade include order, place, range, rank, rate.

upgrade (noun)	grade (noun)
the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)	a variety of cattle produced by crossbreeding with a superior breed
hardware that provides better performance than an earlier version did	a position on a scale of intensity or amount or quality
the property possessed by a slope or surface that rises	the gradient of a slope or road or other surface
a reservation that is improved	the height of the ground on which something stands
software that provides better performance than an earlier version did	a number or letter indicating quality (especially of a student's performance)
an upward slope or grade (as in a road)	a degree of ablaut
	a body of students who are taught together
	one-hundredth of a right angle
	a relative position or degree of value in a graded group

upgrade (verb)	grade (verb)
to improve what was old or outdated	determine the grade of or assign a grade to
give better travel conditions to	assign a rank or rating to
get better travel conditions	assign a grade or rank to, according to one's evaluation
rate higher; raise in value or esteem	level to the right gradient
give a promotion to or assign to a higher position