ambiguity vs ambiguous

ambiguity is a noun but ambiguous is not a noun.

Word	Noun	Adjective	Verb	Adverb
ambiguity	Yes	No	No	No
ambiguous	No	Yes	No	No

ambiguity (noun)	ambiguous (noun)
unclearness by virtue of having more than one meaning
an expression whose meaning cannot be determined from its context

ambiguity (adjective)	ambiguous (adjective)
	having more than one possible meaning
	open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead
	having no intrinsic or objective meaning; not organized in conventional patterns