1. Want of vigilance.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ynwatchfulness,
• hnwatchfulness,
• jnwatchfulness,
• inwatchfulness,
• 8nwatchfulness,
• 7nwatchfulness,
• ubwatchfulness,
• umwatchfulness,
• ujwatchfulness,
• uhwatchfulness,
• unqatchfulness,
• unaatchfulness,
• unsatchfulness,
• uneatchfulness,
• un3atchfulness,
• un2atchfulness,
• unwztchfulness,
• unwstchfulness,
• unwwtchfulness,
• unwqtchfulness

• lax,
• remiss,
• distracted,
• unwatched,
• preoccupied,
• insensitive,
• unwatchful,
• sloppy,
• neglectful,
• inattentive,
• unaware,
• careless,
• unwary.

The adjective form of the word "Unwatchfulness" is "unwatchful".

The plural form of the word "unwatchfulness" is "unwatchfulnesses".

The singular form of the word "unwatchfulness" is "unwatchfulness".