The answer is that there is no homophone for can, but can is a homonym.
The homophone for "hymn" is "him."
Your is a homophone of you're. In some dialects, yore is another homophone.
the homophone for stationery is stationary
The homophone for climate is clime.
The homophone for "stile" is "style."
The homophone for "ale" is "ail."
The homophone of "sell" is "cell."
The homophone is dense.
A homophone for stock is stalk.
A homophone for "taut" is "taught".
A homophone for length is lenth.