forbid vs spoil

forbid is not a noun while spoil is a noun.

Word	Noun	Adjective	Verb	Adverb
forbid	No	No	Yes	No
spoil	Yes	No	Yes	No

As verbs, spoil is a hyponym of forbid; that is, spoil is a word with a more specific, narrower meaning than forbid:

forbid (noun)	spoil (noun)
	the act of stripping and taking by force
	the act of spoiling something by causing damage to it
	(usually plural) valuables taken by violence (especially in war)

forbid (verb)	spoil (verb)
command against	become unfit for consumption or use
keep from happening or arising; make impossible	alter from the original
	make imperfect
	destroy and strip of its possession
	have a strong desire or urge to do something
	hinder or prevent (the efforts, plans, or desires) of
	treat with excessive indulgence
	make a mess of, destroy or ruin