CIS
CISALPINE
CISCO
CISCOES
CISCOS
CISELEUR
CISELEURS
CISELURE
CISELURES
CISLUNAR
CISMONTANE
CISPADANE
CISPLATIN
CISPLATINS
CISPONTINE
CISSIER
CISSIES
CISSIEST
CISSIFIED
CISSING
CISSINGS
CISSOID
CISSOIDS
CISSUS
CISSUSES
CISSY
CIST
CISTACEOUS
CISTED
CISTERN
CISTERNA
CISTERNAE
CISTERNAL
CISTERNS
CISTIC
CISTRON
CISTRONIC
CISTRONS
CISTS
CISTUS
CISTUSES
CISTVAEN
CISTVAENS

43 words start with CIS.