quartic vs biquadratic

quartic and biquadratic both are nouns.

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

As nouns, quartic and biquadratic are synonyms defined as:

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

Other synonyms of quartic include biquadrate, fourth power.

quartic (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

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