Confinement rhymes with:
refinement, alignment, assignment, consignment, realignment, reassignment, refinement, abandonment, adjournment, adornment, alignment, apportionment, arraignment, assignment, atonement, attainment, consignment, containment, discernment, disillusionment, enlightenment, entertainment, environment, imprisonment, infotainment, internment, misgovernment, nongovernment, postponement, realignment, reapportionment, reassignment, refinement, self-government
Confinement sounds like:
championed, combined, companywide, component, compound, compounded, compufund, compumat, confined, confound, confounded, convened, convenient, convent