Internees rhymes with:
returnees, returnees, balinese, cantonese, chinese, designees, detainees, indochinese, japanese, javanese, knees, mcnease, mcnees, menees, neas, nease, nees, neese, neis, niese, nominee's, nominees, pawnees, resignees, returnees, sinise, sneeze, sudanese, taiwanese, trainees, unease
Internees sounds like:
intermec, intermix, interns, intrinsic