A person who backs a politician or a team etc.:
— All their supporters came out for the game.

synonyms: admirer, booster, champion, friend, protagonist.

Roget 215: support, ground, foundation, base, basis; terra firma; bearing, fulcrum, bait [U.S.], caudex crib^†; point d'appui [Fr.], pou sto [Gr.], purchase footing, hold, locus standi [Lat.]; landing place, landing stage; stage, platform; block; rest, resting place; groundwork, substratum, riprap, sustentation, subvention; floor etc. (basement) 211.    supporter; aid etc. 707; prop, stand, anvil, fulciment^†; cue rest, jigger; monkey; stay, shore, skid, rib, truss, bandage; sleeper; stirrup, stilts, shoe, sole, heel, splint, lap, bar, rod, boom, sprit^†, outrigger; ratlings^†.    staff, stick, crutch, alpenstock, baton, staddle^†; bourdon^†, cowlstaff^†, lathi^†, mahlstick^†.    post, pillar, shaft, thill^†, column, pilaster; pediment, pedicle; pedestal; plinth, shank, leg, socle^†, zocle^†; buttress, jamb, mullion, abutment; baluster, banister, stanchion; balustrade; headstone; upright; door post, jamb, door jamb.    frame, framework; scaffold, skeleton, beam, rafter, girder, lintel, joist, travis^†, trave^†, corner stone, summer, transom; rung, round, step, sill; angle rafter, hip rafter; cantilever, modillion^†; crown post, king post; vertebra.    columella^†, backbone; keystone; axle, axletree; axis; arch, mainstay.    trunnion, pivot, rowlock^†; peg etc. (pendency) 214^†; tiebeam etc. (fastening) 45; thole pin^†.    board, ledge, shelf, hob, bracket, trevet^†, trivet, arbor, rack; mantel, mantle piece [Fr.], mantleshelf^†; slab, console; counter, dresser; flange, corbel; table, trestle; shoulder; perch; horse; easel, desk; clotheshorse, hatrack; retable; teapoy^†.    seat, throne, dais; divan, musnud^†; chair, bench, form, stool, sofa, settee, stall; arm chair, easy chair, elbow chair, rocking chair; couch, fauteuil [Fr.], woolsack^†, ottoman, settle, squab, bench; aparejo^†, faldstool^†, horn; long chair, long sleeve chair, morris chair; lamba chauki^†, lamba kursi^†; saddle, pannel^†, pillion; side saddle, pack saddle; pommel.    bed, berth, pallet, tester, crib, cot, hammock, shakedown, trucklebed^†, cradle, litter, stretcher, bedstead; four poster, French bed, bunk, kip, palang^†; bedding, bichhona, mattress, paillasse^†; pillow, bolster; mat, rug, cushion.    footstool, hassock; tabouret^†; tripod, monopod.    Atlas, Persides, Atlantes^†, Caryatides, Hercules.    ... show more

Roget 737b: politics; political science; candidacy, campaign, campaigning, electioneering; partisanship, ideology, factionalism.    election, poll, ballot, vote, referendum, recall, initiative, voice, suffrage, plumper, cumulative vote, plebiscitum [Lat.], plebiscite, vox populi; electioneering; voting etc. v.; elective franchise; straight ticket [U.S.]; opinion poll, popularity poll.    issue; opinion, stand, position; program, platform; party line.    [ideologies] democracy, republicanism; communism, statism, state socialism; socialism; conservatism, toryism; liberalism, whigism; theocracy; constitutional monarchy.    [political parties] party etc. 712; [U.S: Political parties list], Democratic Party, Republican Party, Socialist Party; Communist Party; [U.S. defunct parties: list], Federalist Party, Bull Moose Party, Abolitionist Party; [Germany: list], Christian Democratic Party, Social Democratic Party; National Socialist Worker's Party; [Germany, 1930-1945], Nazi Party; [Great Britain:list], Liberal Party, Labor Party, Conservative Party.    ticket, slate.    [person active in politics] politician activist; [specific politicians: list], candidate, aspirant, hopeful, office-seeker, front-runner, dark horse, long shot, shoo-in; supporter, backer, political worker, campaign worker; lobbyist, contributor; party hack, ward heeler; regional candidate, favorite son; running mate, stalking horse; perpetual candidate, political animal.    political contribution, campaign contribution; political action committee, PAC.    political district, electoral division, electoral district, bailiwick.    electorate, constituents.    get-out-the-vote campaign, political education.    negative campaigning, dirty politics, smear campaign.    [unsuccessful candidate] also-ran, loser; has-been.    [successful candidate] office holder, official, occupant of a position; public servant, incumbent; winner.    ... show more

Dutch: supporter
Polish: stronnik

Someone who supports or champions something.

synonyms: patron, sponsor.

Dutch: schildhouder, beschermer, beschermheer, mecenas, schutsheer, sponsor, steun, stut
Polish: protektor, patron

A person who contributes to the fulfillment of a need or furtherance of an effort or purpose.

synonyms: assistant, help, helper.

Dutch: assistent, helper, hulp, dienstknecht, knecht, waterdrager
Polish: pomagier, pomocnik

A band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve).

synonym: garter.

Dutch: jarretel, jarretel(le), jarretelle, kouseband, kousenband, kousophouder, sokophouder
Polish: podwiązka

A support for the genitals worn by men engaging in strenuous exercise.

synonyms: athletic supporter, jock, jockstrap, suspensor.

Dutch: suspensie, suspensoir
Polish: suspensorium