Another word for collector
One who collects accounts
representative, collection agent, revenue agent, customs official, tax collector, tax officer, toll collector, bill collector, collection agency, office of internal revenue, revenue office, tax man, dun, exciseman (British), revenuer*; see also agent 1, receiver.
One who collects specimens
connoisseur, hobbyist, antiquarian, antiquary, authority, fancier, serious amateur, informed amateur, gatherer, discoverer, compiler, finder, assembler, amasser, accumulator, hoarder, anthologist, curator, librarian, pack rat*; see also antiquarian, curator, scientist, specialist.
Collectors include the following --- of books: bibliophile, bibliopole, bibliotaph, bibliolater, bibliomaniac, bookworm*; of coins: coin collector, numismatist, specialist in numismatics; of eggs: oologist, egger, egg collector, specialist in oology, bird's egg fancier, devotee of egging, egg hound*; of human materials: archaeologist, historiographer, biographer, local historian, ethnologist, ethnographer, ethnographic specialist, specialist in ethnography, ethnohistorian, ethnolinguist, folklorist, curator of folkloristic materials, ethnobotanist; of insects: entomologist, entomographist, lepidopterist, entomographer, specialist in entomology, practitioner of entomology, practitioner of entomography, practitioner of lepidoptery, collector of bugs, collector of insects, collector of butterflies; of rocks: geologist, geognosist, mineralogist, geographer, rock hound*; of plants: botanist, herbalist, ecologist, paleobotanist, curator of a herbarium, curator of herbal collections, physiobotanist; of stamps: stamp collector, philatelist, philatelic dealer, philatelic specialist, expert in philately, specialist in philately.