Synonyms and related words :
beast of burden, dawdle, dawdler, drone, drudge, fag, foot-dragger, galley slave, goldbrick, goof-off, greasy grind, grind, grub, hack, laggard, lie-abed, lingerer, loiterer, procrastinator, slave, sleepyhead, slogger, slow goer, slow-foot, slowbelly, slowpoke, slug, sluggard, snail, stick-in-the-mud, swot, tortoise, workhorse