Onset

Webster's Dictionary of the English Language

·noun A setting about; a beginning.

II. Onset ·vt To set about; to Begin.

III. Onset ·vt To Assault; to set upon.

IV. Onset ·noun Anything set on, or added, as an ornament or as a useful appendage.

V. Onset ·noun A rushing or setting upon; an attack; an assault; a storming; especially, the assault of an Army.