math vs maths

math and maths both are nouns.

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

As nouns, math and maths are synonyms defined as:

math and maths: a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

Other synonyms of math include mathematics.

math (noun)	maths (noun)
a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement	a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement