Is there a word for...?

[Dave]

We use homonym or homophone for words that sound alike but are spelled differently and have different meanings:

• there, their, they're
  
• bore, bore
  
• here, hear
  
• air, heir
  
• etc.,
  

but is there a word for words that are spelled the same but pronounced differently and have different meanings?

• Using my bow, I shot the arrow over the ship's bow.
  
• I'll wind up the rope before the sail catches the wind.
  
• The sewer dropped his needle down the sewer.
  

[Alan Palmer]

It's homograph.

[Dave]

Thanks, Alan.

My Webster's leaves out the "different pronunciation" part:

homograph a word with the same spelling as another but with a different meaning and origin (Ex.: bow, the front part of a ship, bow, to bend)

[Alan Palmer]

Perhaps heteronym might be better for that. From Wikipedia:

When spoken, the meanings may be distinguished by different pronunciations (in which case the words are also heteronyms) or they may not (in which case the words are also both homophones and homonyms