presocratic vs pre-Socratic

presocratic is not a noun while pre-Socratic is a noun.

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

As adjectives, presocratic and pre-Socratic are synonyms defined as:

presocratic (noun)	pre-Socratic (noun)
	any philosopher who lived before Socrates

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