What is a homonym for smell or odour - coin?

The word "coin" is not a homonym for "smell" or "odor." There is no commonly used word that is a homonym for "smell" or "odor."

Homonyms are words that are spelled the same (or sound the same) but have different meanings.

For example:

* To, too, two

* There, their, they're

If you're looking for a synonym for "smell" or "odor," some possibilities are:

* Scent

* Aroma

* Fragrance

* Reek (for a bad smell)