“GIGAWATT” is a valid word. — 13 points Scrabble

waittime during which some action is awaited
twata man who is a stupid incompetent fool
gagamentally or physically infirm with age
twiga small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year
twitsomeone who is regarded as contemptible
watta unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm
gaitthe rate of moving (especially walking or running)
giga

taga label written or printed on paper, cardboard, or plastic that is attached to something to indicate its owner, nature, price, etc.
giglong and light rowing boat; especially for racing
wighairpiece covering the head and made of real or synthetic hair
gaga humorous anecdote or remark intended to provoke laughter
wita message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
titeither of two soft fleshy milk-secreting glandular organs on the chest of a woman
gita person who is deemed to be despicable or contemptible
tattastelessness by virtue of being cheap and vulgar
wat
waga witty amusing person who makes jokes
agatitle for a civil or military leader (especially in Turkey)
att
gata gangster's pistol
twa
awa
tawthe 23rd letter of the Hebrew alphabet
ait

itthe branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information
ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
aw
taa hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
aian agency of the United States Army responsible for providing timely and relevant and accurate and synchronized intelligence to tactical and operational and strategic level commanders
aaa dry form of lava resembling clinkers
tia light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
aga soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography

GIGAWATT