AA
There are only four 3-letter words with AA:
BAA, AAH, AAL, AAS,
but a number of useful words can be made on this common pair:AAs rough, cindery lava (from Hawaiian, where it's pronounced in two syllables, a-a)
BAAs to bleat: BAAed BAAing
BAASes master, bossBAALs false god
BAALIM alternate plural of BAAL
BAALISMs worship of a BAALAAHs to exclaim in amazement, joy or surprise: AAHed, AAHing
AALs an East Indian shrub (AL E. Indian tree)
AALIIs tropical treeMAARs a volcanic crater (from German)
HAARs a wet mist or fog (esp. E. England or Scotland)
HAAFs a deep-sea fishing ground (Shetland and Orkney)
KAAS a large cupboard (KA, KAS)CRAALs CRAALed CRAALing = KRAAL
KRAALs KRAALed KRAALing to pen in a type of enclosure (S. Africa - related to CORRAL)
GRAALs = GRAIL, the object of a long questLAARI a monetary unit of the Maldives
PRAAMs = PRAM, a flat-bottomed boat (esp. of the Baltic and Netherlands)
AARGH AARRGH AARRGHH expression of disgust
SALAAMs SALAAMed SALAAMing greet with a low bow
BAZAARs a marketplace
AARDVARKs (S. African) mammal
AARDWOLF AARDWOLVES (S. African) mammal
AASVOGELs a vulture (S. Africa)
BAASKAAPs the policy of domination of white people in South Africa
KAMAAINAs a longtime resident of Hawaii
LAAGERs LAAGERED LAAGERING (LAGER) to form a defensive encampment
MARKKAA pl. of MARKKA a monetary unit of Finland
RUFIYAA a monetary unit of the Maldives
WADMAALs a thick woolen fabric (WADMALs, WADMELs, WADMOLs, WADMOLLs)