predate vs raven

predate is not a noun while raven is a noun.

Word	Noun	Adjective	Verb	Adverb
predate	No	No	Yes	No
raven	Yes	No	Yes	No

As verbs, predate and raven are synonyms defined as:

Other synonyms of predate include prey.

predate (noun)	raven (noun)
	large black bird with a straight bill and long wedge-shaped tail

predate (verb)	raven (verb)
establish something as being earlier relative to something else	eat greedily
be earlier in time; go back further	feed greedily
come before	prey on or hunt for
prey on or hunt for	obtain or seize by violence