biquadratic vs biquadrate

biquadratic and biquadrate both are nouns.

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

As nouns, biquadratic and biquadrate are synonyms defined as:

biquadratic and biquadrate: an algebraic equation or function of the fourth degree

Other synonyms of biquadratic include fourth power, quartic.

biquadratic (noun)	biquadrate (noun)
a polynomial of the fourth degree	an algebraic equation or function of the fourth degree
an equation of the fourth degree
an algebraic equation or function of the fourth degree

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