Idyllic rhymes with:
acrylic, billick, bilyk, carboxylic, cyrillic, gillick, hydrophilic, jilek, lillich, milich, pedophilic
Idyllic sounds like:
ideal's, idealize, idealizes, ideals, ideologies, ideologue, ideologues, ideology, idles, idolize, idolizes, idols, italic, italics, italish, italy's