1) Bluntness 2) Inattention 3) Inconsiderateness 4) Tactlessness 5) Thoughtlessness 
• (n.) Want of due consideration; inattention to consequences; inconsiderateness.
In`con·sid`er·a'tion noun [ Latin inconsideratio : confer French inconsidération .] Want of due consideration; inattention to consequences; inconsiderateness. « Blindness of mind, inconsideration , precipitation.» Jer. Taylor. « Not gross, willful, del...
[n] - the quality of failing to be considerate of others
inconsiderateness noun the quality of failing to be considerate of others
the quality of failing to be considerate of others