pre-Socratic vs philosopher

pre-Socratic and philosopher both are nouns.

Word	Noun	Adjective	Verb	Adverb
pre-Socratic	Yes	Yes	No	No
philosopher	Yes	No	No	No

As nouns, philosopher is a hypernym of pre-Socratic; that is, philosopher is a word with a broader meaning than pre-Socratic:

pre-Socratic (noun)	philosopher (noun)
any philosopher who lived before Socrates	a specialist in philosophy
	a wise person who is calm and rational; someone who lives a life of reason with equanimity

pre-Socratic (adjective)	philosopher (adjective)
before the time of Socrates