Synonyms and related words :
PP, RD, RFD, Spartan, Vienna sausage, accessible, airmail, all jaw, approachable, artless, ascetic, austere, bald, bangers, bare, barefaced, black pudding, blood pudding, bluff, blunt, bologna, book post, born yesterday, braunschweiger, brazen, broad, brusque, cancellation, candid, chatty, childlike, coarse, common, commonplace, communicative, confiding, conversable, conversational, correspondence, demonstrative, direct, direct mail, direct-mail selling, dispassionate, dog, downright, dry, dull, earthy, effusive, expansive, explicit, express, extroverted, fair, flip, fluent, forthright, fourth-class mail, frankfurter, frankhearted, free, free-speaking, free-spoken, free-tongued, gabby, garrulous, gassy, genuine, glib, gooseliver, gossipy, gregarious, gross, guileless, gushy, gutter, halfpenny post, headcheese, heart-to-heart, homely, homespun, honest, hot dog, impartial, ingenu, ingenuous, innocent, junk mail, just, knockwurst, lean, letter post, letters, liver sausage, liverwurst, long-winded, loquacious, low, mail, mail-order selling, mailing list, matter-of-fact, multiloquent, multiloquious, naive, natural, neat, newspaper post, newsy, on the level, open, openhearted, outgoing, outspoken, overtalkative, parcel post, plain, plain-speaking, plain-spoken, plainspoken, post, post day, postage, postage stamp, postmark, prolix, prosaic, prosing, prosy, pure, rank, raw, registered mail, round, rural delivery, rural free delivery, rustic, salami, saucisse, sausage, scrupulous, sea mail, seapost, self-revealing, self-revelatory, severe, simple, simple-speaking, simplehearted, simpleminded, sincere, single, single-hearted, single-minded, smooth, sober, sociable, spare, special delivery, special handling, stamp, stark, straight, straight-out, straightforward, surface mail, talkative, talky, transparent, trustful, trusting, truthful, unabashed, unadorned, unaffected, unbiased, unchecked, unconcealed, unconstrained, uncouth, undisguised, undissembled, undissembling, unequivocal, unguarded, unhampered, unimaginative, uninhibited, unmannered, unpoetical, unrepressed, unreserved, unrestrained, unrestricted, unreticent, unsecretive, unshrinking, unsilent, unsophisticated, unsuppressed, unsuspicious, unvarnished, unwary, upright, verbose, voluble, vulgar, weenie, wiener, wienerwurst, wienie, windy