Customs rhymes with:
argosystems, biosystems, cablesystems, ecosystems, microsystems, microsystems', subsystems, system's, systems, systems', techsystems, ultrasystems
Customs sounds like:
cadence, cadences, cadmus, cascading, casting, castings, castonguay, catanese, catatonic, cattanach, cautioning, cautions, ceding, chattanooga, chattanooga's, chattanuga, chatting, cheating, chestang, chetniks, chiding, chitinous, citations, citing, coasting, coating, coatings, codding, coding, coexistence, coexisting, costanza, costanzo, costing, costumes, cotton's, cottons, cuauhtemoc, custodians, customize, customizes, cuteness, cutting, cuttings