biquadrate vs biquadratic

biquadrate and biquadratic both are nouns.

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

As nouns, biquadrate and biquadratic are synonyms defined as:

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

Other synonyms of biquadrate include fourth power, quartic.

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

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