The initial idioms of the letter S

security department	security deposit
security director	security force
security guard	security intelligence
Security Intelligence Review Committee	security interest
security measure	security measures
security review	Security Service
security staff	security system
sed rate	Sedalia
sedan	sedan chair
sedate	sedately
sedateness	sedation
sedative	sedative drug
sedative-hypnotic	sedative-hypnotic drug
sedentary	Seder
sedge	sedge bird