ambiguity vs equivocalness

ambiguity and equivocalness both are nouns.

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

As nouns, ambiguity and equivocalness are synonyms defined as:

ambiguity and equivocalness: unclearness by virtue of having more than one meaning

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