Eleuthera rhymes with:
plethora, acampora, acura, agora, amphora, anaphora, andera, ankara, aventura, bachera, barbara, camera, cetera, cholera, corpora, deborah, diaspora, etc, etcetera, genera, imbera, kuchera, lenora, maquiladora, plethora, reitera, samara, tempera, theora, vanora
Eleuthera sounds like:
elater, eldar, elder, eldora, eletr