1. Increased by additions, as a heap: bearing on one point and increasing in cogency by accumulation of proof.

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

• cumultive,
• culmulative,
• cumulutive,
• cummlative,
• acumulative,
• cusultive,
• cumolative,
• culmultive,
• commulative,
• cumilative,
• cumalative,
• acumlative,
• cummulative,
• cumlitive,
• culmulitive,
• cululative,
• cumalitive,
• cumlative,
• cummalative,
• cumualtive

• cumulate,
• cumulatively,
• cum laude.

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

The plural form of the word "cumulative" is "cumulatives".

The singular form of the word "cumulative" is "cumulative". It remains the same in both singular and plural forms.