“AVIATRIX” is a valid word. — 18 points Scrabble

tiaraa jeweled headdress worn by women on formal occasions
varia
atriaany chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
riataa long noosed rope used to catch animals
varixabnormally enlarged or twisted blood vessel or lymphatic vessel

taxia car driven by a person whose job is to take passengers where they want to go in exchange for money
ariaan elaborate song for solo voice
vita
varaa Spanish unit of length (about a yard) having different values in different localities
raia
vair
taxaanimal or plant group having natural relations
airtchannel into a new direction
ixiaa monocotyledonous genus of the family Iridaceae

aira mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of
artthe products of human creativity; works of art collectively
ratany of various long-tailed rodents similar to but larger than a mouse
taxcharge against a citizen's person or property or activity for the support of government
via
ava
tarany of various dark heavy viscid substances obtained as a residue
vata tax levied on the difference between a commodity's price before taxes and its cost of production
ria
vax
vara unit of electrical power in an AC circuit equal to the power dissipated when 1 volt produces a current of 1 ampere
ait
tav
rax

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
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
ara colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
axan edge tool with a heavy bladed head mounted across a handle
aaa dry form of lava resembling clinkers
xithe cardinal number that is the sum of ten and one
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

AVIATRIX