i am assuming you are spelling ambiguity.
I am 99% sure there is no ambiguent in any dictionary. But I could be wrong!
I believe I have heard the word "Ambiguous" used incorrectly, with an "NT" on the end.
Heres the definition for ambiguous
noun ( pl. -ties) uncertainty or inexactness of meaning in language : we can detect no ambiguity in this section of the Act | ambiguities in such questions are potentially very dangerous. • a lack of decisiveness or commitment resulting from a failure to make a choice between alternatives : the film is fraught with moral ambiguity.