Here's what rhymes with lappiest.
theist shiest laciest gaudiest puniest gamiest chariest fruitiest sliest pastiest mousiest wiliest messiest sultriest mangiest untidiest crispiest scaliest tangiest paltriest corniest wintriest unhandiest unwariest unloveliest unmanliest Words that almost rhyme with lappiest
deepest cheapest chiefest decent weakest keenest leant meanest peanut briefest piquant steepest tliat neatest sapient bleakest meekest sheerest leanest realest liefest obscenest serest recent achievement regent sweetest appeasement sicut antient machinist cleanest licit sealant fleetest orthopedist reshipped serenest beechnut meagerest reedit sleekest woodenest treatment agreement secret bereavement indecent sentient decedent leaflet sequenced seulement completest preachment seafront pointillist orthopaedist uncleanest frequent impeachment mendicant benignant bafflement discreetest cajolement convenient concealment maltreatment pretreatment defilement impalement insentient enjambement beguilement pantomimist revilement regalement disagreement infrequent mistreatment disablement enfeeblement underachievement ennoblement inconvenient inconvenienced intercollegiate