Mohammedanism vs monotheism

Mohammedanism and monotheism both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mohammedanism	Yes	No	No	No
monotheism	Yes	No	No	No

As nouns, monotheism is a hypernym of Mohammedanism; that is, monotheism is a word with a broader meaning than Mohammedanism:

Mohammedanism: the monotheistic religious system of Muslims founded in Arabia in the 7th century and based on the teachings of Muhammad as laid down in the Koran
monotheism: belief in a single God

Mohammedanism (noun)	monotheism (noun)
the monotheistic religious system of Muslims founded in Arabia in the 7th century and based on the teachings of Muhammad as laid down in the Koran	belief in a single God