manual laborer vs dockworker

Other hyponyms of manual laborer include agricultural laborer, agricultural labourer, bracero, cleaner, day laborer, day labourer, digger, dishwasher, drudge, galley slave, navvy, peon, gandy dancer, gravedigger, hewer, hand, hired hand, hired man, hod carrier, hodman, gipsy, gypsy, itinerant, faller, feller, logger, lumberjack, lumberman, miner, mineworker, mule driver, mule skinner, muleteer, skinner, platelayer, tracklayer, porter, rail-splitter, splitter, sawyer, section hand, sprayer, stacker, steeplejack, dock-walloper, dock worker, docker, dockhand, loader, longshoreman, lumper, stevedore, fireman, stoker, woodcutter, wrecker, yardman.