Synonyms and related words :
careful, circumspect, cogitative, cognitive, concentrating, concentrative, conceptive, conceptual, conceptualized, considerate, contemplating, contemplative, deliberating, deliberative, discreet, discriminating, discriminative, enlightened, excogitating, ideative, introspective, judgmatic, judicial, judicious, meditating, meditative, mental, museful, musing, noetic, pensive, politic, pondering, prehensive, provident, prudent, prudential, reflecting, ruminant, ruminating, ruminative, serious, sober, speculative, thinking, thought, thoughtful, well-advised, well-judged, wistful