downgrade vs grade

downgrade and grade both are nouns.

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

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

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

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

downgrade (noun)	grade (noun)
the property possessed by a slope or surface that descends	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

downgrade (verb)	grade (verb)
rate lower; lower in value or esteem	determine the grade of or assign a grade to
	assign a rank or rating to
	assign a grade or rank to, according to one's evaluation
	level to the right gradient