Hindooism vs Hindoo

Hindooism and Hindoo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hindooism	Yes	No	No	No
Hindoo	Yes	Yes	No	No

Hindooism (noun)	Hindoo (noun)
a body of religious and philosophical beliefs and cultural practices native to India and based on a caste system; it is characterized by a belief in reincarnation, by a belief in a supreme being of many forms and natures, by the view that opposing theories are aspects of one eternal truth, and by a desire for liberation from earthly evils	a native or inhabitant of Hindustan or India
the religion of most people in India, Bangladesh, Sri Lanka, and Nepal	a person who adheres to Hinduism

Hindooism (adjective)	Hindoo (adjective)
	of or relating to or supporting Hinduism