Here's what rhymes with estuarian.
carrion ovarian clarion agrarian barbarian sectarian vegetarian vulgarian librarian antiquarian libertarian veterinarian centenarian sanitarian seminarian cnidarian authoritarian proletarian disciplinarian trinitarian humanitarian utilitarian egalitarian totalitarian octogenarian nonsectarian septuagenarian valetudinarian nonagenarian sexagenarian communitarian latitudinarian parliamentarian Words that almost rhyme with estuarian
barium aquarium chameleon honorarium vivarium sanitarium nobelium planetarium ferryman ferrymen lesbian thespian pedestrian equestrian vestrymen vestryman