math vs reciprocal

math and reciprocal both are nouns.

Word	Noun	Adjective	Verb	Adverb
math	Yes	No	No	No
reciprocal	Yes	Yes	No	No

math (noun)	reciprocal (noun)
a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement	hybridization involving a pair of crosses that reverse the sexes associated with each genotype
	(mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the multiplicative inverse of 7 is 1/7
	something (a term or expression or concept) that has an inverse relation to something else

math (adjective)	reciprocal (adjective)
	concerning each of two or more persons or things; especially given or done in return
	of or relating to the multiplicative inverse of a quantity or function