Internment rhymes with:
adjournment, discernment, abandonment, adjournment, adornment, alignment, apportionment, arraignment, assignment, atonement, attainment, confinement, consignment, containment, discernment, disillusionment, enlightenment, entertainment, environment, imprisonment, infotainment, misgovernment, nongovernment, postponement, realignment, reapportionment, reassignment, refinement, self-government
Internment sounds like:
indeterminate, interand, intermedia, intermediate, intermet, interned, internet, interrante, interrent