One-consonant words

When you want to dump lots of vowels, these can be come in handy.

No consonant

EAU   n water (plural EAUX)

Letter B

ABA   n a sleeveless Arab garment
ABO   (not in OSPD3)
BAA   v to bleat
BEAU  n a boyfriend (plural BEAUS or BEAUX)
BEE
BIO   n a biography
BOA   n a large snake
BOO
OBE   n a form of African sorcery (also OBEAH, OBI, OBIA)
OBI   n a form of African sorcery (also OBE, OBEAH, OBIA)
OBIA  n a form of African sorcery (also OBE, OBEAH, OBI)
OBOE

Letter C

ACE
AECIA n plural of AECIUM (a spore-producing organ in some fungi)
CEE   n the letter C
CIAO  i expression of farewell
COO   v to make the sound of a dove
COOEE v to cry out shrilly
CUE
ECU   n an old French coin
ICE
OCA   n a South American herb

Letter D

ADIEU n a farewell (plural ADIEUS or ADIEUX)
ADO
AID
AIDE
AUDIO
DEE   n the letter D
DIE
DOE
DUE
DUI   n plural of DUA (an instrumental duet)
DUO   n an instrumental duet (plural DUETS or DUI)
EIDE  n plural of EIDOS (an essence)
IDEA
ODE
ODEA  n plural of ODEUM (a theater or concert hall)
OIDIA n plural of OIDIUM (a type of fungus)
OUD   n an African stringed instrument
UDO   n a Japanese herb

Letter F

FEE
FEU   v to grant land under Scottish law
FIE   i expression to shame
FOE
FOU   j drunk
OAF   n a clumsy, stupid person (plural OAFS, OAVES)

Letter G

AGA   n a high-ranking Turkish officer
AGE
AGEE  a to one side (also AJEE)
AGIO  n a premium paid in currency exchange
AGO
AGUE  n a malarial fever
EGO
GAE   v to go
GEE   v to turn right
GIE   v to give
GOA   n an Asian gazelle
GOO
OGEE  n an S-shaped molding

Letter H

AAH   v to exclaim surprise
AHA   i expression of triumph
HAE   v to have
HAO   n a monetary unit of Vietnam (plural HAO)
HIE   v to hurry
HOE
HUE
OHIA  n a tropical tree (also LEHUA)
OHO   i expression of surprise
OOH   v to exclaim in amazement

Letter J

AJEE  a to one side (also AGEE)
JEE   v to turn right
JEU   n a game (plural JEUX)
JIAO  n a monetary unit of China (also CHIAO, plural CHIAO)
JOE   n a fellow

Letter K

AKEE  n a tropical tree
AUK   n a diving seabird
EKE
KAE   n a crow-like bird
KEA   n a parrot
KOA   n a timber tree
KOI   n a large and colorful fish (plural KOI)
KUE   n the letter Q
OAK
OKA   n a Turkish unit of weight (also OKE)
OKE   n a Turkish unit of weight (also OKA)
UKE   n a ukelele

Letter L

AAL   n an East Indian shrub
AALII n a tropical tree
AIL
AIOLI n a Garlic mayonnaise
ALA   n a wing (plural ALAE)
ALAE  n plural of ALA (a wing)
ALE
ALEE  a toward the side of a vessel away from the wind
ALOE
EEL
ILEA  n plural of ILEUM (a part of the small intestine)
ILIA  n plural of ILIUM (a bone of the pelvis)
LEA   n a meadow
LEE   n a shelter from the wind
LEI   n a wreath of flowers
LEU   n a monetary unit of Romania (plural LEI)
LIE
LIEU  n stead
LOO   v to subject to forfeit in loo (a card game)
LOOIE n a lieutenant (also LOOEY, LOUIE)
LOUIE n a lieutenant (also LOOEY, LOOIE)
LUAU  n a Hawaiian feast
OIL
OLE   n a shout of approval
OLEA  n plural of OLEUM (a corrosive liquid)
OLEO  n margarine
OLIO  n a miscellaneous collection
ULU   n an Eskimo knife

Letter M

AIM   
AMA   n an Oriental nurse (also AMAH)
AMI   n a friend
AMIA  n a freshwater fish
AMIE  n a female friend
AMU   n a unit of mass
EME   n an uncle
EMEU  n a large flightless bird (also EMU)
EMU   n a large flightless bird (also EMEU)
MAE   n more
MEOU  v to make a cat's sound (also MEOW, MIAOU, MIAOW)
MIAOA v to make a cat's sound (also MEOW, MIAOU, MIAOW)
MOA   n an extinct flightless bird
MOO   v to make a cow's sound
MOUE  n a pouting grimace

Letter N

AEON  n an indefinitely long time (also EON)
AIN   n a Hebrew letter (also AYIN)
ANA   n a collection of information about a subject
ANE   n one
ANI   n a tropical American bird
ANOA  n a wild ox
EON   n an indefinitely long time (also AEON)
INIA  n plural of INION (a part of the skull)
ION
NAE   a no
NAOI  n plural of NAOS (an ancient temple)
NEE   j born with the name of
NOO   a now
ONE
UNAI  n a two-toed sloth (also UNAU)
UNAU  n a two-toed sloth (also UNAU)

Letter P

APE
EPEE  n a type of sword
OPE   v to open
PEA
PEE   n the letter P
PIA   n a membrane of the brain
PIE
PIU   a more (used in music)
POI   n a Hawaiian food
UPO   p upon

Letter Q

AQUA  n water (plural AQUAE or AQUAS)
AQUAE n plural of AQUA (water)
QUA   a in the capacity of
QUAI  n a wharf (also QUAY)
QUEUE v to line up

Letter R

AERIE n a bird's nest in a cliff
AERO  j pertaining to aircraft
AIR
ARE   n unit of surface measure
AREA
AREAE n plural of AREA (section of cerebral cortex with function)
ARIA  n an elaborate solo melody
AURA  n an invisible emanation (plural AURAS or AURAE)
AURAE n plural of AURA (an invisible emanation)
AUREI n plural of AUREUS (a ancient Roman gold coin)
EAR
EERIE
ERA
ERE
EURO  n a large kangaroo
IRE
OAR
OORIE j shivering with cold (also OURIE)
ORA   n plural of OS (an orifice)
ORE   
OUR
OURIE j shivering with cold (also OORIE)
RAIA  n a non-Muslim inhabitant of Turkey (also RAYA, RAYAH)
REE   n a female sandpiper
REI   n an erroneus English version of a Portuguese coin
RIA   n a long, narrow inlet
ROE   n a mass of eggs within a female fish
ROUE  n a lecherous man
RUE   v to feel sorry for
URAEI n plural of URAEUS (serpent figure on ancient Egyptian headress)
UREA  n a chemical compound

Letter S

AAS
AIS
ASEA  a at sea
EASE
OES
OSE   n a narrow ridge of sand (also ESKAR, ESKER, OS)
SAE   a so
SAU   n a monetary unit of Vietnam (also XU, plural SAU)
SEA
SEE
SEI   n a rorqual
SOU   n a former French coin
SUE
USE

Letter T

AIT   n a small island
ATE
AUTO
EAT
ETA
ETUI  n a case for holding small articles
IOTA
OAT   n a cereal grass
OOT   n out
OUT
TAE   p to
TAO   n a path of virtuous conduct in Chinese philosophy
TAU
TEA
TEE   v to place a golf ball on a peg
TIE
TOE
TOEA  n a monetary unit of Papau New Guinea (plural TOEA)
TOO
TUI   n a bird of New Zealand
UTA   n any of a genus of lizards

Letter V

AVA   a at all
AVE   n an expression of farewell
AVO   n a monetary unit of Macau
EAVE
EVE
OVA   n plural of OVUM (female reproductive cell in mammals)
UVEA  n a layer of the eye
VAU   n a Hebrew letter (also VAV, VAW, WAW)
VEE   n the letter V
VIA   p by way of
VIE
VOE   n a small bay, creek, or inlet

Letter W

AWA   a away
AWE
AWEE  a awhile
EWE
OWE
WAE   n woe
WEE   j small
WOE
WOO

Letter X

AXE
EAUX  n plural of EAU (water)
IXIA  n a flowering plant
OXO   j containing oxygen (also OXY)

Letter Y

AYE
EYE
YEA   n an affirmative vote
YOU

Letter Z

AZO   j containing nitrogen
OOZE
OUZO  n a Greek liqueur
ZEE   n the letter Z
ZOA   n plural of ZOON (the whole product of one fertilized egg)
ZOEA  n a larval form of certain crustaceans (plural ZOEAS, ZOEAE)
ZOEAE n plural of ZOEA (a larval form of certain crustaceans
ZOO