suddenly
Joshua 10:9
Joshua therefore came unto them suddenly, and went up from Gilgal all night.
1 Thessalonians 5:2
For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
1 Thessalonians 5:3
For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.