Search Result for "inattention": 
Wordnet 3.0

NOUN (1)

1. lack of attention;

The Collaborative International Dictionary of English v.0.48:

Inattention \In`at*ten"tion\, n. [Pref. in- not + attention: cf. F. inattention.] Lack of attention, or failure to pay attention; disregard; heedlessness; neglect. [1913 Webster] Novel lays attract our ravished ears; But old, the mind inattention hears. --Pope. Syn: Inadvertence; heedlessness; negligence; carelessness; disregard; remissness; thoughtlessness; neglect. Usage: Inattention, Inadvertence. We miss seeing a thing through inadvertence when do not happen to look at it; through inattention when we give no heed to it, though directly before us. The latter is therefore the worse. Inadvertence may be an involuntary accident; inattention is culpable neglect. A versatile mind is often inadvertent; a careless or stupid one is inattentive. [1913 Webster]
WordNet (r) 3.0 (2006):

inattention n 1: lack of attention [ant: attending, attention]
Moby Thesaurus II by Grady Ward, 1.0:

102 Moby Thesaurus words for "inattention": accidia, acedia, apathy, ataraxia, ataraxy, callowness, carelessness, casualness, childishness, culpa, culpable negligence, default, delinquency, dereliction, detachment, disconformity, disinterest, dispassion, disregard, disregardfulness, distractedness, distraction, diversion, divided attention, easygoingness, failure, heedlessness, immaturity, imprudence, inadvertence, inadvertency, inadvisability, inconsideration, incuriosity, indiscreetness, indiscretion, indiscrimination, inexcitability, inexpedience, injudiciousness, inobservance, insouciance, irrationality, laches, lack of affect, lackadaisicalness, laissez-faire, lapse, laxity, laxness, listlessness, looseness, mindlessness, neglect, neglectfulness, negligence, nonadherence, nonchalance, noncompliance, nonconformance, nonconformity, nonfeasance, nonfulfillment, noninterference, nonobservance, nonperformance, nonrestriction, omission, overlooking, oversight, permissiveness, pococurantism, pompousness, poor stewardship, procrastination, puerility, reasonlessness, recklessness, regardlessness, remissness, senselessness, slackness, slight, sloth, stuffiness, thoughtlessness, unanxiousness, unconcern, unintelligence, unmindfulness, unobservance, unreason, unreasonableness, unrigorousness, unsensibleness, unsolicitousness, unsoundness, unthoughtfulness, unwisdom, unwiseness, withdrawal of attention, witlessness