No definitions found for 'on one occasion'
Perhaps one of these:
on one's own account,
one one's coattails,
on one's peril,
omnium-gatherum,
ominousness,
ononis,
on one's legs,
on one's honor,
onymous,
ominously,
one-night stand,
onionskin,
ouananiche,
onancock,
onanist,
on one's own hook,
on one's last legs,
onion smut,
onomasticon,
on-hanger,
onanism,
ominous,
oneness,
onomastic,
onion creek,
ononis spinosa,
one-winged,
on one's guard,
owning,
onion stem,
ononis arvensis,
onion creek, tx,
onomastics,
on one's half,
onancock, va,
on one's hands,
ononis repens,
onion salt