Communications' rhymes with:
communications, telecommunications, telecommunications', communications, telecommunications, telecommunications', communications, telecommunications, telecommunications', communications, telecommunications, telecommunications'
Communications' sounds like:
coincidence, coincidences, coinciding, communicating, communication's, communications, conceding, concocting, concoctions, conjugations, connecting, connections, consistence, consistency, consisting, constance, constancy, constituencies, constituency, constituting, constitution's, constitutions