You can have these pretty in colour or printable in black and white.

• Sound Clones colour   These sound the same but look different.  Also known as spelling variations. These are split into commone and less common examples.
• Sound Clones b&w

• Spelling Clones colour  These look the same or are spelt the same but sound different.  They are pronunciation variations. I hope someone can think of a more elegant term!
• Spelling Clones b&w