combining form vs seeded

combining form is a noun but seeded is not a noun.

Word	Noun	Adjective	Verb	Adverb
combining form	Yes	No	No	No
seeded	No	Yes	No	No

combining form (noun)	seeded (noun)
a bound form used only in compounds

combining form (adjective)	seeded (adjective)
	(of the more skilled contestants) selectively arranged in the draw for position in a tournament so that they meet each other in later rounds
	sprinkled with seed
	having or supplied with seeds
	having seeds as specified
	having the seeds extracted