psychedelic vs psychedelia

psychedelic is not a noun while psychedelia is a noun.

Word	Noun	Adjective	Verb	Adverb
psychedelic	No	Yes	No	No
psychedelia	Yes	No	No	No

psychedelic (noun)	psychedelia (noun)
	the subculture of users of psychedelic drugs

psychedelic (adjective)	psychedelia (adjective)
(of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair
having the vivid colors and bizarre patterns associated with psychedelic states
producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis