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