value vs grade

value and grade both are nouns.

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

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

value: 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 value include mark, score, rate, value, standardise, standardize, reassess, reevaluate, censor, praise.

value (noun)	grade (noun)
the quality (positive or negative) that renders something desirable or valuable	a variety of cattle produced by crossbreeding with a superior breed
relative darkness or lightness of a color	a position on a scale of intensity or amount or quality
a numerical quantity measured or assigned or computed	the gradient of a slope or road or other surface
an ideal accepted by some individual or group	the height of the ground on which something stands
the amount (of money or goods or services) that is considered to be a fair equivalent for something else	a number or letter indicating quality (especially of a student's performance)
(music) the relative duration of a musical note	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

value (verb)	grade (verb)
evaluate or estimate the nature, quality, ability, extent, or significance of	determine the grade of or assign a grade to
regard highly; think much of	assign a rank or rating to
estimate the value of	assign a grade or rank to, according to one's evaluation
fix or determine the value of; assign a value to	level to the right gradient
hold dear