dispair
The answer is that there is no homophone for can, but can is a homonym.
The collective noun is a wilderness of despair. The noun despair is also a collective noun for a despair of writers, a despair of goths.
Your is a homophone of you're. In some dialects, yore is another homophone.
the homophone for stationery is stationary
The homophone is dense.
The homophone is cell.
The homophone is ail.
there is no homophone for length
The homophone is taught.
stock homophone
Hour is a homophone for Our
A homophone for to is too or two.