1. In an occasional manner.

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

• occasionnally,
• ocasonally,
• occasionaly,
• occassionaly,
• occasinaly,
• occaisionally,
• occasonally,
• occassionally,
• occasoinally,
• occasionely,
• occaionally,
• occassionlly,
• ocacsionally,
• occasianlly,
• occaisonally,
• ocassionally,
• occiasionally,
• occsionally,
• acasionally,
• occationally

• occasional,
• occasions.

The adjective form of the word "occasionally" is "occasional".

The plural form of the word "occasionally" is "occasionally".

The singular form of the word "occasionally" is "occasion"