FAD
FADABLE
FADAISE
FADAISES
FADDIER
FADDIEST
FADDINESS
FADDINESSES
FADDISH
FADDISHLY
FADDISHNESS
FADDISHNESSES
FADDISM
FADDISMS
FADDIST
FADDISTS
FADDLE
FADDLED
FADDLES
FADDLING
FADDY
FADE
FADEAWAY
FADEAWAYS
FADED
FADEDLY
FADEDNESS
FADEDNESSES
FADEIN
FADEINS
FADELESS
FADELESSLY
FADEOUT
FADEOUTS
FADER
FADERS
FADES
FADEUR
FADEURS
FADGE
FADGED
FADGES
FADGING
FADIER
FADIEST
FADING
FADINGS
FADLIKE
FADO
FADOMETER
FADOMETERS
FADOS
FADS
FADY

54 words start with FAD.