Synonyms and related words :
Bohemian, affable, casual, cordial, degage, easy, easygoing, familiar, folksy, free and easy, gracious, haymish, homely, homey, inconsiderate, informal, irregular, loose, natural, offhand, offhanded, plain, relaxed, sharp, simple, sociable, thoughtless, unaffected, unassuming, unconstrained, unconventional, ungracious, unofficial, unstudied