possessed vs demoniacal

possessed and demoniacal both are adjectives.

Word	Noun	Adjective	Verb	Adverb
possessed	No	Yes	No	No
demoniacal	No	Yes	No	No

As adjectives, possessed and demoniacal are synonyms defined as:

possessed and demoniacal: of, pertaining to, or like a demon or possession by a demon

Other synonyms of possessed include demoniac.

possessed (adjective)	demoniacal (adjective)
of, pertaining to, or like a demon or possession by a demon	of, pertaining to, or like a demon or possession by a demon
influenced or controlled by a powerful force such as a strong emotion