The Collaborative International Dictionary of English v.0.48:

Manufacturer \Man`u*fac"tur*er\, n.
   One who manufactures.
   [1913 Webster]

WordNet (r) 3.0 (2006):

manufacturer
    n 1: a business engaged in manufacturing some product [syn:
         manufacturer, maker, manufacturing business]
    2: someone who manufactures something [syn: manufacturer,
       producer]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "manufacturer":
   ancestors, apprentice, architect, artificer, artist, author,
   begetter, beginner, builder, conceiver, constructor, craftsman,
   creator, designer, deviser, discoverer, effector, engenderer,
   engineer, executor, executrix, fabricator, father, founder,
   generator, grower, inaugurator, industrialist, initiator,
   instigator, institutor, introducer, inventor, journeyman, maker,
   master, master craftsman, mother, organizer, originator,
   past master, planner, precursor, prime mover, producer, raiser,
   realizer, shaper, sire, smith, wright