| abrader | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abradant |
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| autoloader | (noun) a firearm that reloads itself | Synonyms: self-loader |
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| bandleader | (noun) the leader of a dance band | - |
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| breechloader | (noun) a gun that is loaded at the breech | - |
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| cheerleader | (noun) someone who leads the cheers by spectators at a sporting event | - |
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| (noun) an enthusiastic and vocal supporter | - |
| copyreader | (noun) an editor who prepares text for publication | Synonyms: copy editor, text editor |
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| crusader | (noun) a disputant who advocates reform | Synonyms: meliorist, reformer, reformist, social reformer |
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| degrader | (noun) a person who lowers the quality or character or value (as by adding cheaper metal to coins) | Synonyms: debaser |
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| doubleheader | (noun) two games instead of one (especially in baseball when the same two teams play two games on the same day) | Synonyms: double feature, twin bill |
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| escalader | (noun) someone who gains access by the use of ladders | - |
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| freeloader | (noun) someone who takes advantage of the generosity of others | - |
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| grader | (noun) a judge who assigns grades to something | - |
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| header | (noun) (soccer) the act of hitting the ball with your head | - |
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| (noun) a headlong jump (or fall) | - |
| (noun) a machine that cuts the heads off grain and moves them into a wagon | - |
| (noun) a framing member crossing and supporting the ends of joists, studs, or rafters so as to transfer their weight to parallel joists, studs, or rafters | - |
| (noun) brick that is laid sideways at the top of a wall | Synonyms: cope, coping |
| (noun) horizontal beam used as a finishing piece over a door or window | Synonyms: lintel |
| (noun) a line of text serving to indicate what the passage below it is about | Synonyms: head, heading |
| homesteader | (noun) someone who settles lawfully on government land with the intent to acquire title to it | Synonyms: nester, squatter |
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| invader | (noun) someone who enters by force in order to conquer | Synonyms: encroacher |
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| leader | (noun) a featured article of merchandise sold at a loss in order to draw customers | Synonyms: drawing card, loss leader |
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| (noun) a person who rules or guides or inspires others | - |
| loader | (noun) a laborer who loads and unloads vessels in a port | Synonyms: dock-walloper, dock worker, docker, dockhand, dockworker, longshoreman, lumper, stevedore |
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| (noun) an attendant who loads guns for someone shooting game | - |
| masquerader | (noun) a participant in a masquerade | Synonyms: masker, masquer |
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| misleader | (noun) someone who leads astray (often deliberately) | - |
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| newsreader | (noun) someone who reads out broadcast news bulletin | Synonyms: news reader |
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| nonreader | (noun) a student who is very slow in learning to read | - |
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| (noun) a person unable to read | Synonyms: illiterate, illiterate person |
| parader | (noun) walks with regular or stately step | Synonyms: marcher |
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| persuader | (noun) someone who tries to persuade or induce or lead on | Synonyms: inducer |
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| pleader | (noun) a lawyer who pleads cases in court | Synonyms: advocate, counsel, counsellor, counselor-at-law, counselor |
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| proofreader | (noun) someone who reads proof in order to find errors and mark corrections | Synonyms: reader |
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| railroader | (noun) an employee of a railroad | Synonyms: railroad man, railway man, railwayman, trainman |
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| reader | (noun) one of a series of texts for students learning to read | - |
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| (noun) a person who enjoys reading | - |
| (noun) a public lecturer at certain universities | Synonyms: lector, lecturer |
| (noun) someone who contracts to receive and pay for a service or a certain number of issues of a publication | Synonyms: subscriber |
| (noun) a person who can read; a literate person | - |
| (noun) someone who reads proof in order to find errors and mark corrections | Synonyms: proofreader |
| (noun) someone who reads manuscripts and judges their suitability for publication | Synonyms: referee, reviewer |
| (noun) someone who reads the lessons in a church service; someone ordained in a minor order of the Roman Catholic Church | Synonyms: lector |
| redheader | (noun) someone who has red hair | Synonyms: carrottop, red-header, redhead |
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| ringleader | (noun) a person who leads (especially in illicit activities) | - |
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| rollerblader | (noun) a skater who uses Rollerblades | - |
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| sightreader | (noun) a performer who reads without preparation or prior acquaintance (as in music) | - |
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| spreader | (noun) a hand tool for spreading something | - |
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| (noun) a mechanical device for scattering something (seed or fertilizer or sand etc.) in all directions | Synonyms: broadcaster |
| threader | (noun) a blunt needle for threading ribbon through loops | Synonyms: bodkin |
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| trader | (noun) someone who purchases and maintains an inventory of goods to be sold | Synonyms: bargainer, dealer, monger |
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| wader | (noun) any of many long-legged birds that wade in water in search of food | Synonyms: wading bird |
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