Ouija board vs Ouija

Ouija board and Ouija both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ouija board	Yes	No	No	No
Ouija	Yes	No	No	No

As nouns, Ouija board and Ouija are synonyms defined as:

Ouija board and Ouija: a board with the alphabet on it; used with a planchette to spell out supernatural messages

Ouija board (noun)	Ouija (noun)
a board with the alphabet on it; used with a planchette to spell out supernatural messages	a board with the alphabet on it; used with a planchette to spell out supernatural messages