Dominicans rhymes with:
american's, americans', mexicans, new-mexicans, pelican's, pelicans, republican's, republicans, republicans', transamerican's, vatican's
Dominicans sounds like:
damaging, dancing, dehumanizing, demagoguing, demjanjuk, demjanjuk's, demonizing, denison's, denizens, denkins, denouncing, dimensions, diminishing, dinkins, dinkins', doomsaying, downsizing, downsizings, downswing, duensing, dungeons