maths vs math

maths and math both are nouns.

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

As nouns, maths and math are synonyms defined as:

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

Other synonyms of maths include mathematics.

maths (noun)	math (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