DIF
DIFF
DIFFARREATION
DIFFARREATIONS
DIFFER
DIFFERED
DIFFERENCE
DIFFERENCED
DIFFERENCES
DIFFERENCIED
DIFFERENCIES
DIFFERENCING
DIFFERENCY
DIFFERENCYING
DIFFERENT
DIFFERENTIA
DIFFERENTIABLE
DIFFERENTIAE
DIFFERENTIAL
DIFFERENTIALLY
DIFFERENTIALS
DIFFERENTIATE
DIFFERENTIATED
DIFFERENTIATES
DIFFERENTIATING
DIFFERENTIATION
DIFFERENTIATOR
DIFFERENTIATORS
DIFFERENTLY
DIFFERENTNESS
DIFFERENTNESSES
DIFFERING
DIFFERS
DIFFICILE
DIFFICULT
DIFFICULTIES
DIFFICULTLY
DIFFICULTY
DIFFIDENCE
DIFFIDENCES
DIFFIDENT
DIFFIDENTLY
DIFFLUENT
DIFFORM
DIFFORMITIES
DIFFORMITY
DIFFRACT
DIFFRACTED
DIFFRACTING
DIFFRACTION
DIFFRACTIONS
DIFFRACTIVE
DIFFRACTIVELY
DIFFRACTIVENESS
DIFFRACTOMETER
DIFFRACTOMETERS
DIFFRACTOMETRIC
DIFFRACTOMETRY
DIFFRACTS
DIFFRANGIBILITY
DIFFRANGIBLE
DIFFS
DIFFUSE
DIFFUSED
DIFFUSEDLY
DIFFUSEDNESS
DIFFUSEDNESSES
DIFFUSELY
DIFFUSENESS
DIFFUSENESSES
DIFFUSER
DIFFUSERS
DIFFUSES
DIFFUSIBILITIES
DIFFUSIBILITY
DIFFUSIBLE
DIFFUSIBLENESS
DIFFUSING
DIFFUSION
DIFFUSIONAL
DIFFUSIONISM
DIFFUSIONISMS
DIFFUSIONIST
DIFFUSIONISTS
DIFFUSIONS
DIFFUSIVE
DIFFUSIVELY
DIFFUSIVENESS
DIFFUSIVENESSES
DIFFUSIVITIES
DIFFUSIVITY
DIFFUSOR
DIFFUSORS
DIFS
DIFUNCTIONAL
DIFUNCTIONALS

96 words start with DIF.