grade vs level

grade and level both are nouns.

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

As nouns, grade and level are synonyms defined as:

grade and level: a position on a scale of intensity or amount or quality

Other synonyms of grade include degree.

As nouns, grade and level are synonyms defined as:

grade and level: a relative position or degree of value in a graded group

Other synonyms of grade include tier.

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

Other hypernyms of grade include even, even out, flush.

grade (noun)	level (noun)
a variety of cattle produced by crossbreeding with a superior breed	indicator that establishes the horizontal when a bubble is centered in a tube of liquid
a position on a scale of intensity or amount or quality	a structure consisting of a room or set of rooms at a single position along a vertical scale
the gradient of a slope or road or other surface	a flat surface at right angles to a plumb line
the height of the ground on which something stands	a position on a scale of intensity or amount or quality
a number or letter indicating quality (especially of a student's performance)	height above ground
a degree of ablaut	an abstract place usually conceived as having depth
a body of students who are taught together	a specific identifiable position in a continuum or series or especially in a process
one-hundredth of a right angle	a relative position or degree of value in a graded group
a relative position or degree of value in a graded group

grade (adjective)	level (adjective)
	of the score in a contest
	being on a precise horizontal plane
	not showing abrupt variations
	having a surface without slope, tilt in which no part is higher or lower than another
	oriented at right angles to the plumb

grade (verb)	level (verb)
determine the grade of or assign a grade to	become level or even
assign a rank or rating to	talk frankly with; lay it on the line
assign a grade or rank to, according to one's evaluation	direct into a position for use
level to the right gradient	aim at
	make level or straight
	tear down so as to make flat with the ground