Wordsmith Wednesday

I haven't delivered a straight up etymology/derivative post since APRIL, so I figure it's high time!

Root: 

vert/vers - [Latin] to turn

Derivatives:

adverse - to turn against (adversarial, adversary, adversity, inadvertent)

avert - to turn away

controvert - to turn in the opposite direction (controvertible, controvertibly, incontrovertible, controversy, controversial, controversialist)

divert - to turn aside; deflect (diverter, divertive, diverse, diversion, diversionary, diversional)

extrovert - to turn outward (extroverted, extrovertive)

introvert - to turn inward (introverted, introversive, introvertive)

invert - to turn upside down (invertibility, inverse, inversion)

revert - to turn back (revertible, revertibility, reverse, reversion, reversible, irreversible, reversionary, reversionist)

subvert - to turn over; overthrow; undermine (subverter, subversive, subversion)

transverse - to turn across; side to side (transversal)

version - a turning of words or facts

versify - to turn into poetry (verisfication, verse)

vertigo - a turning; dizziness

Can you think of more derivatives?  I feel certain I've forgotten something obvious!