Similar:
off-and-on,
either/or,
toggleable,
dichotomical,
halfopen,
downside up,
full-out,
on-line,
on-stage,
on-time,
more...
Opposite:
▸ Words similar to on/off
▸ Usage examples for on/off
▸ Idioms related to on/off
▸ Wikipedia articles (New!)
▸ Words that often appear near on/off
▸ Rhymes of on/off
▸ Invented words related to on/off