Letter words

Letters seem to provide a large number of short, useful words.

This is almost certainly not an exhaustive list.

English letters

BEE     B
CEE     C
DEE     D
EF/EFF  F
GEE/JEE G (also means to turn)
AITCH   H
JAY     J
KAY     K
EL/ELL  L
EM      M
EN      N
PEE     P
KUE     Q
AR      R
ES/ESS  S
TEE     T
VEE     V
EX      X
WYE     Y
ZEE/ZED/IZZARD Z

Greek letters

ALPHA
BETA
GAMMA
DELTA
EPSILON
ZETA
ETA
THETA
IOTA
KAPPA
LAMBDA
MU
NU
XI
OMICRON
PI
RHO
SIGMA
TAU
UPSILON
PHI
CHI/KHI
PSI
OMEGA

Hebrew letters

ALEPH/ALEF
BETH
GIMEL
DALETH/DALEDH
HE
WAW/VAW/VAV/VAU
ZAYIN
HETH/HEH/KHET/KHETH/HET
TETH
YOD/YODH
KAPH/KAF/KHAF/KHAPH
LAMED/LAMEDH
MEM
NUN
SAMEKH/SAMEK/SAMECH
AYIN/AIN
PE/PEH/FEH
SADHE/SADE/SADI
QOPH/KOPH
RESH
SIN
SHIN
TAW/TAV

Old English letters/runes

ASH
EDH/ETH  Ð ð
THORN    Þ þ
YOGH
WYNN/WYN

Arabic letters

Except for ALIF, Arabic letters apparently don't qualify for English, but many are words in the singular and plural form anyway.

ALIF
BA
TA
DAL
DHAL
SIN
DAD
FA
KAY
LAM
NUN
HA
WAW