Dressmaker as an adjective denotes clothing made in the style of a dressmaker, frequently in the term dressmaker details which includes ruffles, frills, ribbon or braidtrim. Dressmaker in this sense is contrasted to tailored and has fallen out of use since the rise of casual wear in the mid-twentieth century.
Mantua-maker, in the eighteenth century a maker of mantuas, or in general a dressmaker.
Modiste, a maker of fashionable clothing and accessories, with the implication that the articles made reflect the current Parisfashions.
Sewing professional is the most general term for those who make their living by sewing, teaching, writing about sewing, or retailing sewing supplies. She or he may work out of her home, a studio, or retail shop, and may work part-time or full-time. She or he may be any or all or the following sub-specialities:
A custom clothier makes custom garments one at a time, to order, to meet an individual customer's needs and preferences.
A custom dressmaker specializes in women's custom apparel, including day dresses, careerwear, suits, evening or bridal wear, sportswear, or lingerie.
A tailor makes custom menswear-style jackets and the skirts or trousers that go with them, for men or women.
An alterations specialist or alterationist adjusts the fit of completed garments, usually ready-to-wear, or restyles them. Note that while all tailors can do alterations, by no means can all alterationists do tailoring.
Designers choose combinations of line, proportion, color, and texture for intended garments. They may have no sewing or patternmaking skills, and may only sketch or conceptualize garments.
Patternmakers flat draft the shapes and sizes of the numerous pieces of a garment by hand using paper and measuring tools or by computer using AutoCAD based software, or by draping muslin on a dressform.
A wardrobe consultant or fashion advisor recommends styles and colors for a client.
A seamstress is someone who sews seams, or in other words, a machine operator in a factory who may not have the skills to make garments from scratch or to fit them on a real body. This term is not a synonym for dressmaker. Prior to the Industrial Revolution, a seamstress did handsewing, especially under the putting-out system. Older variants are seamster and sempstress.
Sewist is a relatively new term, combining the words "sew" and "artist", to describe someone who creates sewn works of art, which can include clothing or other items made with sewn elements.