Eye rhyme
From Hull AWE
We have eye rhyme when two lines of verse end with words which are spelt similarly but which despite this are pronounced differently - for example, tough, plough; love, move; good, blood; show, now. These pairs of words look to the eye as if they rhyme, but in fact they do not.
Eye rhyme is sometimes called visual rhyme, sight rhyme, or printers' rhyme.
See further pararhyme and half-rhyme.