There are many many abbreviations used for words on CW, ranging from commonly used abbreviations like B4 for Before or TU for Thank You to very obscure abbreviations known only to the one using them. Thus such a list must be a very subjective list. The following are what I believe to be the most common and easiest to understand abbreviations.

Abbrev.

Word

Abbrev.

Word

ABT

About

OB

Old boy

ADR

Address

OM

Old man

AGN

Again

OP

Operator

ANT

Antenna

OT

Old timer; old top

B4

Before

PSE

Please

C

Yes

PWR

Power

CFM

Confirm

RIG

Station equipment

CUL

See you later

RPT

Repeat; report

ES

And

RX; RCVR

Receiver

FB

Fine business

SED

Said

GA

Go ahead

SEZ

Says

GA

Good afternoon

SIG

Signal

GB

Good bye

SKED

Schedule

GB

God bless

SRI

Sorry

GE

Good evening

TMW

Tomorrow

GG

Going

TNX

Thanks

GM

Good morning

TT

That

GN

Good night

TU

Thank you

GND

Ground

TVI

Television interference

GUD

Good

TX

Transmitter

HI

Laughter

UR; URS

Your; Yours

HI

High

VY

Very

HR

Here; hear

WKD; WKG

Worked; working

HV

Have

WL

Will

HW

How; how copy

WUD

Would

LID

A poor operator

WX

Weather

MSG

Message

XMTR

Transmitter

N

No

YF; XYL

Wife

NIL

Nothing

YL

Young lady

NR

Number

73

Best regards

NW

Now

88

Love and kisses