Rarest rhymes with:
aquarist, barest, embarrassed, merest, terraced, aquarist, armbrust, barest, buttressed, dearest, deforest, direst, embarrassed, florist, forest, forrest, guitarist, interest, jurist, laforest, merest, nearest, noninterest, pendergrast, psychiatrist, purest, rainforest, reforest, severest, terraced, tourist
Rarest sounds like:
raced, racette, rachad, racicot, raciest, racist, racked, racket, racquet, raged, ragged, raggedy, raghida, ragweed, raised, raked, rashad, rasheed, rashid, rast, rawest, razed, reached, react, reacted, rearrest, rearrested, reassessed, recadi, recast, recede, receded, recessed, rechecked, recht, recite, recited, reckitt, rectitude, recused, regatta, rehearsed, reissued, reist, reject, rejected, rejoiced, request, requested, requisite, rescued, reseda, reseed, reset, reshot, reside, resided, residue, resist, resisted, rest, restate, restated, rested, restitute, resto, resuscitate, resuscitated, reused, reust, reworked, rhizoid, ricciuti, richaud, richest, richwhite, rickett, rickety, rickwood, ricochet, ricocheted, rigged, righetti, right, righted, righto, righty, rigid, rigidity, risked, riskiest, risotto, rist, ristau, ristow, rizzuti, rizzuto, roast, roasted, rochat, rochette, rocked, rocket, rocketed, rockett, rockette, rockwood, roget, rogstad, roost, roosted, rosado, rosati, rosato, roseate, rosete, rosett, rosetta, rosette, rosetti, rosewood, rosita, rossetti, rossetto, rost, rostad, rosty, roughed, roughest, roughshod, rought, roused, ruchti, ruest, rugged, rujith, ruscitti, rused, rushdie, rushed, russet, russett, rust, rustad, rusted, rusty