Shipster

That "ster" is a feminine termination is the notion of Tyrwhitt in a note upon Hoppesteris in a passage of Chaucer (*Knight's Tale*, l. 2019.); but to ignorant persons it seems not very probable. "Maltster," surely, is not feminine, still less "whipster;" "dempster," Scotch, is a judge. Sempstress has another termination on purpose to make it feminine. I wish we had a dictionary, like that of Hoogeven for Greek, arranging words according to their terminations.