FOCACCIA
FOCACCIAS
FOCAL
FOCALISATION
FOCALISATIONS
FOCALISE
FOCALISED
FOCALISES
FOCALISING
FOCALIZATION
FOCALIZATIONS
FOCALIZE
FOCALIZED
FOCALIZES
FOCALIZING
FOCALLY
FOCI
FOCIMETER
FOCIMETERS
FOCOMETER
FOCOMETERS
FOCUS
FOCUSABLE
FOCUSED
FOCUSER
FOCUSERS
FOCUSES
FOCUSING
FOCUSINGS
FOCUSLESS
FOCUSSED
FOCUSSES
FOCUSSING

33 words start with FOC.