Bellwethers rhymes with:
another's, bathers, birdfeather's, birdfeathers, bothers, brother's, brothers, brothers', carithers, carothers, carrithers, carrothers, carruthers, caruthers, cather's, cathers, crothers, dithers, druthers, father's, fathers, feathers, flathers, forefathers, furthers, gathers, get-togethers, gethers, godfather's, godfathers, godmothers, grandfather's, grandfathers, grandmother's, grandmothers, heather's, heathers, lathers, leathers, mathers, mother's, mothers, nethers, other's, others, others', rather's, slathers, smathers, smethers, smithers, smothers, southers, strothers, struthers, suthers, tethers, togethers, weather's, weathers, withers, zithers
Bellwethers sounds like:
balderas, baldric, baldrige, balladur's, beladur's, bewilders, bladders, blowdries, blowdryers, blowtorch, blowtorches, boulders, builder's, builders, builders'