1. All through life.

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

• lifeling,
• lifelog,
• lifelongf,
• liflong,
• lifelone,
• liifelong,
• felong,
• lifeloing,
• diphylon,
• kifelong,
• pifelong,
• oifelong,
• livelong,
• lielong,
• lifleong,
• liffelong,
• life long,
• Lifgeivng,
• lifeelng,
• leifelong

• life line,
• liopelma,
• lifeline,
• livelong.

The adjective form of the word "lifelong" is "lifelong".

The plural form of "lifelong" is "lifelongs".

The singular form of the word "lifelong" is "lifetime"