Nettle rhymes with:
betel, gettel, gettle, gretal, gretel, hettel, kettell, kettle, metal, mettle, petal, resettle, settle, trettel, unsettle, zettel, zettle
Nettle sounds like:
nadal, nadel, nadell, natal, natala, natale, natali, natalia, natalie, natalle, nathalia, nathalie, natoli, nattily, neatly, nedel, needle, neidl, neonatal, new-delhi, nidal, nodule, noodle, nutley, nuttall, nuttle