predecessor vs precede

predecessor is a noun but precede is not a noun.

Word	Noun	Adjective	Verb	Adverb
predecessor	Yes	No	No	No
precede	No	No	Yes	No

predecessor (noun)	precede (noun)
something that precedes and indicates the approach of something or someone
one who precedes you in time (as in holding a position or office)

predecessor (verb)	precede (verb)
	furnish with a preface or introduction
	move ahead (of others) in time or space
	be the predecessor of
	be earlier in time; go back further
	come before