abetter abstracter accepter adapter adviser affirmer aider almoner annoyer arbiter assenter asserter bailer caster censer (vessel) concocter condenser conferrer conjurer consulter continuer contradicter contriver convener conveyer corrupter covenanter debater defender deliberater deserter desolater deviser discontinuer disturber entreater exalter exasperater exciter executer (except in law) expecter frequenter granter idolater imposer impugner incenser inflicter insulter interceder interpreter interrupter inviter jailer lamenter mortgager (except in law) obliger obstructer obtruder perfecter perjurer preventer probationer propeller protester recognizer regrater relater respecter sailer (ship) sorcerer suggester supplanter upholder vender

The following nouns end in _-or_.

abbreviator abductor abettor (law) abominator abrogator accelerator acceptor accommodator accumulator actor adjudicator adjutor administrator admonitor adulator adulterator aggregator aggressor agitator amalgamator animator annotator antecessor apparitor appreciator arbitrator assassinator assessor benefactor bettor calculator calumniator captor castor (oil) censor coadjutor collector competitor compositor conductor confessor conqueror conservator consignor conspirator constrictor constructor contaminator contemplator continuator contractor contributor corrector councillor counsellor covenantor (law) creator creditor cultivator cunctator debtor decorator delator (law) denominator denunciator depredator depressor deteriorator detractor dictator dilator director dissector disseizor disseminator distributor divisor dominator donor effector elector elevator elucidator emulator enactor equivocator escheator estimator exactor excavator exceptor executor (law) exhibitor explorator expositor expostulator extensor extirpator extractor fabricator factor flexor fornicator fumigator generator gladiator governor grantor (law) habitator imitator impostor impropriator inaugurator inceptor incisor inheritor initiator innovator insinuator institutor instructor interlocutor interpolator interrogator inventor investor juror lector legator legislator lessor mediator modulator monitor mortgagor (law) multiplicator narrator navigator negotiator nonjuror numerator objector obligor (law) observator operator originator pacificator participator peculator percolator perforator perpetrator persecutor perturbator possessor preceptor precursor predecessor predictor prevaricator procrastinator procreator procurator professor progenitor projector prolocutor promulgator propagator propitiator proprietor prosecutor protector protractor purveyor recognizor (law) recriminator reflector regenerator regulator relator (law) rotator sacrificator sailor (seaman) scrutator sculptor sectator selector senator separator sequestrator servitor solicitor spectator spoliator sponsor successor suitor supervisor suppressor surveyor survivor testator tormentor traitor transgressor translator valuator vendor (law) venerator ventilator vindicator violator visitor