appraise vs grade

appraise is not a noun while grade is a noun.

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

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

appraise: evaluate or estimate the nature, quality, ability, extent, or significance of
grade: assign a grade or rank to, according to one's evaluation

Other hyponyms of appraise include mark, score, rate, value, standardise, standardize, reassess, reevaluate, censor, praise.

appraise (noun)	grade (noun)
	a variety of cattle produced by crossbreeding with a superior breed
	a position on a scale of intensity or amount or quality
	the gradient of a slope or road or other surface
	the height of the ground on which something stands
	a number or letter indicating quality (especially of a student's performance)
	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

appraise (verb)	grade (verb)
consider in a comprehensive way	determine the grade of or assign a grade to
evaluate or estimate the nature, quality, ability, extent, or significance of	assign a rank or rating to
	assign a grade or rank to, according to one's evaluation
	level to the right gradient