rationalisation vs maths

rationalisation and maths both are nouns.

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

rationalisation (noun)	maths (noun)
systematic organization; the act of organizing something according to a system or a rationale	a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
(mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation
the organization of a business according to scientific principles of management in order to increase efficiency
the cognitive process of making something seem consistent with or based on reason
(psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening