1. Weightily.

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

• nomentously,
• komentously,
• jomentously,
• mimentously,
• mkmentously,
• mlmentously,
• mpmentously,
• m0mentously,
• m9mentously,
• monentously,
• mokentously,
• mojentously,
• momwntously,
• momemtously,
• monmentously,
• momentousley,
• momentiousely,
• mumentously,
• moumentously,
• momemtasly

• momently,
• momentum,
• momentousness,
• momentaneous,
• momentary,
• momentous,
• momentarily.

The adjective form of "momentously" is "momentous".

The plural form of "momentously" is "momentously".

The singular form of the word "momentously" is "momentous"