Synonyms of offsides

Noun

1. offside, mistake, error, fault

usage: (sport) the mistake of occupying an illegal position on the playing field (in football, soccer, ice hockey, field hockey, etc.)

Adjective

1. offside (vs. onside), offsides

usage: illegally beyond a prescribed line or area or ahead of the ball or puck; "the touchdown was nullified because the left tackle was offside"