From The Collaborative International Dictionary of English v.0.44 [gcide]:
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
83 Moby Thesaurus words for "heedful": accommodating, accommodative, advertent, agog, agreeable, alert, all ears, all eyes, assiduous, attentive, aware, canny, careful, cautious, circumspect, complaisant, concentrated, conscientious, conscionable, conscious, considerate, curious, deliberate, delicate, diligent, discreet, earnest, exact, finical, finicking, finicky, fussy, gingerly, guarded, helpful, hesitant, indulgent, intense, intent, intentive, judicious, leaving out nothing, lenient, loving, meticulous, mindful, mindful of others, nice, niggling, noncommittal, obliging, observant, observing, on guard, on the ball, on the job, open-eared, open-eyed, openmouthed, overlooking no possibility, painstaking, pawky, politic, prudent, punctilious, punctual, regardful, safe, scrupulous, slow to act, solicitous, tactful, tender, tentative, thorough, thoughtful, tolerant, unadventurous, uncommunicative, undaring, unenterprising, unprecipitate, watchful
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Let's see what we can do if we put our heads together.0