SAX
SAXATILE
SAXAUL
SAXAULS
SAXE
SAXES
SAXHORN
SAXHORNS
SAXICAVOUS
SAXICOLE
SAXICOLINE
SAXICOLOUS
SAXIFRAGACEOUS
SAXIFRAGE
SAXIFRAGES
SAXITOXIN
SAXITOXINS
SAXONIES
SAXONITE
SAXONITES
SAXONY
SAXOPHONE
SAXOPHONES
SAXOPHONIC
SAXOPHONIST
SAXOPHONISTS
SAXTUBA
SAXTUBAS

28 words start with SAX.