biquadratic vs maths

biquadratic and maths both are nouns.

Word	Noun	Adjective	Verb	Adverb
biquadratic	Yes	Yes	No	No
maths	Yes	No	No	No

biquadratic (noun)	maths (noun)
a polynomial of the fourth degree	a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
an equation of the fourth degree
an algebraic equation or function of the fourth degree

biquadratic (adjective)	maths (adjective)
involving the fourth and no higher power of a quantity or degree