RS = rhinoceros
RT = repugnant
RU: rondeau
RV = rev
RW = rainbow
RX: reflux
RY = rickety
RZ - razz
SA = soda
SB - sob
SC - sadistic
SD = shroud
SE - sometime, somewhere, someplace, someone
SF- scoff
SG - snowing
SH = shush
SI: spaghetti
SJ - Sij, either of two Iranian villages
SK = silk
SL = sepulchral