Here are a few possibilities:
* "Eye" is a common rhyming word that works with many words ending in "-y" or "-ie".
* "Day" is another simple word that rhymes with a large number of words, particularly those ending in "-ay" or "-ey."
* "Way" is similar to "day" in its versatility.
Ultimately, the "easiest" word to rhyme with depends on the specific context and the sound you're trying to create.