philosophical vs philosopher

philosophical is not a noun while philosopher is a noun.

Word	Noun	Adjective	Verb	Adverb
philosophical	No	Yes	No	No
philosopher	Yes	No	No	No

philosophical (noun)	philosopher (noun)
	a specialist in philosophy
	a wise person who is calm and rational; someone who lives a life of reason with equanimity

philosophical (adjective)	philosopher (adjective)
of or relating to philosophy or philosophers
characterized by the attitude of a philosopher; meeting trouble with level-headed detachment