doer vs loose cannon

Other hyponyms of doer include adventurer, venturer, anachronism, applicant, applier, appointee, appointment, capitalist, captor, capturer, changer, modifier, common man, common person, commoner, communicator, contestant, coward, creator, controversialist, disputant, eristic, applied scientist, engineer, technologist, entertainer, experimenter, expert, gipsy, gypsy, individualist, denizen, dweller, habitant, indweller, inhabitant, aboriginal, aborigine, indigen, indigene, native, native, inexperienced person, innocent, intellect, intellectual, lover, loved one, leader, money dealer, money handler, national, subject, nonreligious person, nonworker, compeer, equal, match, peer, beholder, observer, perceiver, percipient, percher, forerunner, precursor, primitive, primitive person, religious person, sensualist, traveler, traveller, unfortunate, unfortunate person, persona non grata, unwelcome person, unskilled person, worker, African, African-American, Black, Negro, Negroid, Caucasian, White, White person, Slav, gentile, Hebrew, Israelite, Jew, Aries, Ram, Bull, Taurus, Gemini, Twin, Cancer, Crab, Leo, Lion, Virgin, Virgo, Balance, Libra, Scorpio, Scorpion, Archer, Sagittarius, Capricorn, Goat, Aquarius, Water Bearer, Fish, Pisces, abator, abjurer, abomination, abstainer, abstinent, nondrinker, achiever, succeeder, success, winner, acquaintance, friend, acquirer, active, adjudicator, admirer, adoptee, adversary, antagonist, opponent, opposer, resister, advisee, advocate, advocator, exponent, proponent, affiant, agnostic, doubter, amateur, ancient, anti, anti-American, apprehender, appreciator, archaist, arrogator, assessee, asthmatic, authority, autodidact, automaton, zombi, zombie, baby boomer, boomer, baby buster, buster, bad guy, bad person, baldhead, baldpate, baldy, skin, skinhead, balker, baulker, noncompliant, bullfighter, toreador, bather, beard, bedfellow, bedmate, bereaved, bereaved person, best, topper, birth, biter, blogger, bluecoat, bodybuilder, muscle-builder, muscle builder, musclebuilder, muscleman, bomber, buster, candidate, prospect, caregiver, case, cashier, catch, match, celebrant, celebrater, celebrator, censor, centrist, middle of the roader, moderate, moderationist, chameleon, beguiler, charmer, chutzpanik, closer, clumsy person, aggregator, collector, battler, belligerent, combatant, fighter, scrapper, complexifier, compulsive, computer user, conservative, conservativist, contemplative, convert, ape, aper, copycat, emulator, imitator, counter, counterterrorist, crawler, creeper, creditor, dancer, social dancer, debaser, degrader, debitor, debtor, defecator, shitter, voider, delayer, deliverer, demander, demon, dieter, differentiator, discriminator, disentangler, unraveler, unraveller, contestant, dissenter, dissident, objector, protester, divider, domestic partner, significant other, spousal equivalent, spouse equivalent, double, image, look-alike, dresser, dribbler, driveller, drooler, slobberer, drug user, substance abuser, user, busy bee, eager beaver, live wire, sharpie, sharpy, eccentric, eccentric person, flake, geek, oddball, effecter, effector, elder, senior, Elizabethan, emotional person, animator, energiser, energizer, vitaliser, vitalizer, enjoyer, enrollee, ethnic, adventurer, explorer, ex-spouse, extravert, extrovert, faddist, faller, fastener, fiduciary, first-rater, follower, free agent, free spirit, freewheeler, friend, fleer, fugitive, runaway, gainer, gainer, weight gainer, gambler, gatekeeper, gatherer, ball of fire, go-getter, whiz-kid, whizz-kid, good guy, good person, granter, greeter, saluter, welcomer, grinner, groaner, grunter, guesser, hater, hoper, host, huddler, hugger, important person, influential person, personage, interpreter, Jack of all trades, Jat, jumper, junior, killer, slayer, kink, kneeler, knocker, apprehender, knower, kook, odd fellow, odd fish, odd man out, queer bird, queer duck, Latin, laugher, assimilator, learner, scholar, student, left-hander, lefty, southpaw, liberal, liberalist, progressive, liberal, lightning rod, linguist, polyglot, literate, literate person, liver, longer, thirster, yearner, mailer, malcontent, manipulator, man of action, man of deeds, married, masturbator, onanist, measurer, nonmember, mestizo, middlebrow, militarist, warmonger, miracle man, miracle worker, misfit, misogamist, modern, monolingual, mother hen, maimer, mangler, mutilator, namer, neglecter, neighbor, neighbour, neutral, nondescript, nonparticipant, nonpartisan, nonpartizan, nonperson, unperson, nonresident, nonsmoker, nude, nude person, nurser, occultist, optimist, ostrich, ejector, ouster, outcaste, outdoorsperson, owner, possessor, disarmer, pacificist, pacifist, coddler, mollycoddler, pamperer, spoiler, excuser, forgiver, pardoner, partner, party, passer, patrician, perspirer, sweater, philosopher, chooser, picker, selector, pisser, urinator, contriver, deviser, planner, player, pledgee, pledger, posturer, powderer, ball of fire, fireball, human dynamo, powerhouse, preserver, professional, professional person, public relations person, pursuer, pussycat, quitter, radical, rara avis, rare bird, realist, rectifier, registrant, allayer, comforter, reliever, repeater, recoverer, rescuer, saver, rester, controller, restrainer, revenant, have, rich person, wealthy person, riser, romper, ruler, swayer, rusher, scientist, scratcher, mediocrity, second-rater, cloud seeder, seeder, quester, searcher, seeker, segregate, romanticist, sentimentalist, sex object, sex symbol, mover and shaker, shaker, showman, signatory, signer, skidder, slider, slipper, slave, slave, sleepyhead, sloucher, smasher, smiler, sneezer, sniffer, sniffler, sniveler, snuffer, snuffler, sobersides, socialiser, socializer, man of the world, sophisticate, sounding board, sphinx, expectorator, spitter, sprawler, spurner, homebody, stay-at-home, smotherer, stifler, stoic, unemotional person, stooper, stranger, struggler, case, guinea pig, subject, supernumerary, surrenderer, yielder, survivalist, survivor, suspect, tagger, tagger, tapper, tempter, termer, scourge, terror, threat, testate, testator, third-rater, thrower, tiger, totemist, toucher, transfer, transferee, attempter, essayer, trier, turner, tyrant, ugly duckling, opener, undoer, unfastener, untier, user, vanisher, dupe, victim, Victorian, visionary, waiter, waker, walk-in, needer, wanter, ward, warrior, watcher, weasel, squirmer, wiggler, wriggler, winker, withholder, witness, worldling, yawner, Black person, blackamoor, mentee, mentoree, prepper, tsundere, paypig, badass.