List of informal synonyms and informal related words.
Bohemian, affable, beat, beat-up, bedraggled, blowzy, breakaway, careless, casual, chintzy, colloquial, common, conversational, cordial, degage, dilapidated, drabbletailed, draggled, draggletailed, easy, easygoing, en deshabille, everyday, familiar, far out, folksy, free, free and easy, fringy, frowzy, frumpish, frumpy, garden-variety, gracious, grubby, haymish, heretical, heterodox, hippie, homely, homey, in dishabille, in rags, irregular, kinky, loose, lumpen, maverick, messy, mussy, natural, negligent, nonstandard, not cricket, not done, not kosher, offbeat, offhand, offhanded, ordinary, original, plain, poky, private, ragged, raggedy, relaxed, ruinous, scraggly, seedy, shabby, shoddy, simple, slack, slatternly, slipshod, sloppy, slovenly, sluttish, sociable, sordid, special, spoken, spontaneous, sporty, squalid, substandard, tacky, tattered, unaffected, unassuming, unauthorized, unceremonious, unconstrained, unconventional, uneducated, unfashionable, unkempt, unliterary, unneat, unofficial, unorthodox, unpretentious, unsightly, unstudied, untidy, vernacular, way out