Two Letter Words
All of the Two Letter Words in the WORDOX Dictionary:

aa ab ad ae ag ah ai al am an ar as at aw ax ay

ba be bi bo by

de do

ed ef eh el em en er es et ex

fa

go

ha he hi hm ho

id if in is it

jo

ka

la li lo

ma me mi mm mo mu my

na ne no nu

od oe of oh om on op or os ow ox oy

pa pe pi

re

sh si so

ta ti to

uh um un up us ut

we wo

xi xu

ya ye yo

Definitions (for many of the words):
aa - basaltic lava having a rough surface
ab - an abdominal muscle
ad - an advertisement
ah - an exclamation expressing surprise, pity, complaint, dislike, joy, or various other emotions depending upon the manner of utterance.
ai - a large sloth of Central and South America, having three toes on each forelimb
am - first person conjugation of the verb "to be"
an - indefinite article, the form of 'a' before an initial vowel sound and sometimes before an h
as - similarly; equally; to such a degree or extent
at - in the position of
aw - an exclamation expressing protest, disbelief or disgust
ax - an instrument with a blanded head on a handle used for chopping
ba - from Egyptian religion, an aspect of the soul represented as a human-headed bird
be - to exist
by - near to or next to
do - to perform, execute, or accomplish an act (also a deer, a female deer)
eh - an utterance usually expressing surprise or doubt or seeking confirmation, esp. used by Canadians
el - an elevated railroad
em - (Printing terminology) the square of any size of typed used as the unit of measurement for matter printed in that type size
en - (Printing terminology) half the width of an em, the square of any size of typed used as the unit of measurement for matter printed in that type size
er - an interjection used to express a pause, hesitation or uncertainty
ex - a former lover
fa - the syllable used for the fourth tone of a diatonic scale (also a long, long way to run)
go - to move along
ha - an exclamation of surprise, interrogation, suspicion, or triumph
he - the male being in question or last mentioned
hi - an interjection used as an exclamation of greeting
ho - used as a call to attract attention, sometimes specially used after a word denoting a destination
id - the part of the psyche residing in the unconscious that is the source of instinctive energy
if - in case that; granting or supposing that
in - used to indicate inclusion within a space or a place
is - third person conjugation of the verb "to be"
it - used to represent an innanimate thing understood, previously mentioned or about to be mentioned
ka - from Egyptian religion, a spiritual entity, an aspect of the individual, believed to live within th body during life and to survive it after death
la - the syllable used for the sixth tone of the diatonic scale (also a note to follow so)
li - a Chinese unit of distance equvalent to about one third of a mile
lo - an interjection meaning look or behold
ma - an informal term for mother
me - the objective case of 'I'
mi - the syllable used for the third tone of the diatonic scale (also a name I call myself)
mu - the 12th letter of the greek alphabet
my - the possesive case of 'I'
no - a negative used to express dissent, denial, or refusal
nu - the 13th letter of the Greek alphabet
od - a hypothetical force formerly held to pervade all nature and to manifest itself in magnetism and chemical action
oe - a whirlwind that occurs in the vicinity of the Faeroe Islands
of - used to indicate derivation, origin, or source
oh - used as an expression of surprise or pain
om - a mantra used when meditating
on - so as to be or remain supported by
or - used to connect words, phrases, or clauses representing alternatives
os - a bone
ow - an interjection used to express intense or sudden pain
ox - the adult castrated male of the genus Bos, used as a draft animal and for food
oy - an interjection used to express dismay, annoyance, or grief
pa - an informal term for father
pi - the 16th letter of the greek alphabet, used to represent the ratio of the circumference of a circle to its diameter.
re - the syllable used for the second tone of the diatonic scale (also a drop of gleaming sun)
so - to the extent or degree indicated or suggested; for this or that reason (also a needle pulling thread)
ti - the syllable for the seventh tone of the diatonic scale (also a drink with jam and bread)
to - used for expressing motion or direction toward a point
uh - an expression of hesitation (see er)
um - an expression of hesitation (my seventh grade science teacher took off a point for every time we said this word during a presentation)
up - to, toward, or in a more elevated position
us - the objective case of we
we - nominative plural of 'I'
xi - the 14th letter of the Greek alphabet (I always had trouble writing this one)
ye - used nominatively as the plural of thou in poetic contexts
yo - used as an exclamation to express excitement or get someone's attention