am·big·u·ous

– adj.
1. open to or having several possible meanings or interpretations; equivocal.
2. exhibiting constructional homonymity; having two or more structural descriptions, as the sequence Flying planes can be dangerous.
3. of doubtful or uncertain nature; difficult to comprehend, distinguish, or classify.
4. lacking clearness or definiteness; obscure; indistinct.

hom·o·nym

– noun
1. a word the same as another in sound and spelling but different in meaning.
2. a namesake.
3. a name given to a species or genus that has been assigned to a different species or genus and that is therefore rejected.