Collins Scrabble Words 2 letters history
Progression of valid two-letter words in Collins Scrabble Words or SOWPODS by CMG Lee. Data is from http://theguardian.com/books/2019/may/02/scrabble-change-of-mindset-allows-use-of-ok , http://telegraph.co.uk/games/10426222/Scrabble-essentials-two-letter-words.html and http://en.wiktionary.org/wiki/Appendix:Official_English_Scrabble_2-letter_words .
PH
AA
AB
AD
AE
AG
AH
AI
AL
AM
AN
AR
AS
AT
AW
AX
AY
BA
BE
BI
BO
BY
CH
DA
DE
DI
DO
EA
ED
EE
EF
EH
EL
EM
EN
ER
ES
ET
EW
EX
FA
FE
FY
GI
GO
GU
HA
HE
HI
HM
HO
ID
IF
IN
IO
IS
IT
JA
JO
KA
KI
KO
KY
LA
LI
LO
MA
ME
MI
MM
MO
MU
MY
NA
NE
NO
NU
NY
OB
OD
OE
OF
OH
OI
OK
OM
ON
OO
OP
OR
OS
OU
OW
OX
OY
PA
PE
PI
PO
QI
RE
SH
SI
SO
ST
TA
TE
TI
TO
UG
UH
UM
UN
UP
UR
US
UT
WE
WO
XI
XU
YA
YE
YO
YU
ZA
ZE
ZO
V◽
◽C
◽J
◽Q
◽V
◽Z
removed in 2007
FE JA KI ZA
added in 2006
EW OK ZE
added in 2019