predate vs prey

predate is not a noun while prey is a noun.

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

As verbs, predate and prey are synonyms defined as:

Other synonyms of predate include raven.

predate (noun)	prey (noun)
	animal hunted or caught for food
	a person who is the aim of an attack (especially a victim of ridicule or exploitation) by some hostile person or influence

predate (verb)	prey (verb)
establish something as being earlier relative to something else	profit from in an exploitatory manner
be earlier in time; go back further	prey on or hunt for
come before
prey on or hunt for