Zen Buddhism vs Zen Buddhist

Zen Buddhism and Zen Buddhist both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zen Buddhism	Yes	No	No	No
Zen Buddhist	Yes	No	No	No

Zen Buddhism (noun)	Zen Buddhist (noun)
a Buddhist doctrine that enlightenment can be attained through direct intuitive insight	an adherent of the doctrines of Zen Buddhism
school of Mahayana Buddhism asserting that enlightenment can come through meditation and intuition rather than faith; China and Japan