シ

sewing machine

brush

classical music

system

single

symbol

script

symposium

condominium (usu. mid or high-rise)

shopping

special

chanson

shirt (undergarment)

shock (emotional)

rush (of people or activity)

(formal) shirt

seat

sheet

nonfiction

taxi

season (period in which regulated games are played)

series

fiction

receipt

fashion

rush hour

commercial (TV or radio advertisement)

shower

carnation (Dianthus caryophyllus)

(camera) shutter

shoes

automation

mechanical pencil

recreation

intonation

chic

sash

thin

ship

deci-

tissue

Gothic (style)

gossip

cyan

Chicago

civic

shift

silk

syrup

sink

maxi (skirt, coat, etc.)

senior

cinema

severe

(Communist, union, etc.) sympathizer

symposium

machine

Messiah

communication

cash card

silicon (Si)

syringe

silhouette

synchronization

pepsin

Michigan

assistance

oasis

siesta

signal

citron (Citrus medica)

cinnamon

cynical

synonym

cesium (Cs)

serious

Sirius (star in the constellation Canis Major)

simple

decibel

nothing

headlight flashing (as a signal to another driver)

boisterously

aggressive

Gaussian

crisis

systems

calcium (Ca)

classical

Colosseum (amphitheatre in Rome)

Zionist

Zionism

cyclamen (esp. species Cyclamen persicum)

singles (tennis, badminton, etc.)

symbolic

scholarship

physical contact (between friends, mother and child, etc.)

dancing

dressing

Helsinki (Finland)

penicillin

boxing

Polynesia

machine gun

assistant

accident

Catholicism

six nines (i.e. 99.9999%)

think tank

symbolist

time machine

flexible

Micronesia

magnesium (Mg)

kickboxing

cohabitation

synchronization

Pennsylvania

San Francisco

section

national

fascist

fascism

action

option

caching

Gestapo

commission

charming

liquor

shocking

(emotional) tension

Pacific (Ocean)

push-button telephone

pension (Western-style boarding house)

position

magician

recession

refreshment

shuttle bus

sunshine

sharing

getting in shape

facsimile

potential

reaction

eyeshadow

energetic

(car) horn

collection (of art, stamps, etc.)

connection