→ to operate, to operate on, to affect, to avail, to impact, to impinge, to produce, to take
action
opiner
→ to opine, to give an opinion
opposer
→ to clash, to oppose
oppresser
→ to oppress
opprimer
→ to oppress
opter
→ to opt, to choose, to opt for
optimaliser
→ to optimize
optimiser
→ to optimize
orbiter
→ to orbit
orchestrer
→ to orchestrate