Insilco rhymes with:
bilko, lilco, milco, milko, acapulco, alco, balko, belko, bifulco, bilko, carolco, codelco, copelco, defalco, delco, difalco, elco, elko, falco, fidelco, finalco, fulco, gelco, halko, intelco, ipalco, lilco, maniscalco, mihalko, milco, milko, nalco, norelco, palco, palko, pavelko, stelco, telco, valko, wellco, worlco, zelko
Insilco sounds like:
ingalls, ingels, ingles, inglese, inglis, inglish, insalaco