Homonymy

noun

1. The quality or condition of being homonymous.
2. Sameness of name with a difference of meaning; ambiguity; equivocation; specifically, in philology, the character of homonyms.
3. Sameness of name or designation; identity in relations.
4. Sameness of name or designation of things or persons which are different; ambiguity.
5. The property of being a homonym.