Possible Clues:

• Similarity of words in spelling, not in pronunciation
• Words which look similar but sound different
• I recited Frost, say, or Keats and Yeats, for example
• For example know how to scan piece of poetry
• Maid said, for example, to be shy?
• It can be seen to sound similar (or not) at the end
• Love and move eg
• Similarity between words in spelling but not in sound
• Rough lough, say
• Wood for food, maybe