equivocalness vs equivocal

equivocalness is a noun but equivocal is not a noun.

Word	Noun	Adjective	Verb	Adverb
equivocalness	Yes	No	No	No
equivocal	No	Yes	No	No

equivocalness (noun)	equivocal (noun)
unclearness by virtue of having more than one meaning

equivocalness (adjective)	equivocal (adjective)
	open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead
	uncertain as a sign or indication
	open to question