1.   You say a few careless words to a neighbour and suddenly everyone knows about it.

2.   ...the high-risk world of real estate, where one careless word could blow a whole deal.

3.   Now it all went for nought because of a few careless words.

4.   After a reasonable interval, the board of governors will have to judge whether he has repaired the breach caused by his careless words.

5.   They cower silently in our midst, fearing that one careless word might trigger a new flood of millennium roundups.

6.   Oh, dear Reader, you cannot imagine the agony that tore through my exotic heart at the sound of those careless words.