Civilian rhymes with:
pavilion, pavillion, pavilion, pavillion, vaudevillian, billion, brazilian, castrillon, crocodilian, dillion, filion, fillion, hillian, jillion, killian, killion, mcmillian, mcmillion, million, multibillion, multimillion, octillion, papillion, pavilion, pavillion, pillion, quillian, reptilian, stillion, trillion, vaudevillian, vermilion, vermillion, zillion
Civilian sounds like:
cableone, caplan, caplin, cephalon, chaplain, chaplan, chaplin, choplin, cipollone, cofflin, copelan, copelin, coplan, coplen, coplin, coppolino, couvillion, couvillon