“AIRTH” is a valid word. — 8 points Scrabble

haira covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss
hartUnited States playwright who collaborated with George S. Kaufman (1904-1961)
rath
thir
tahr
airtchannel into a new direction

hit(baseball) a successful stroke in an athletic contest (especially in baseball)
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
hatheaddress that protects the head from bad weather; has shaped crown and usually a brim
ratany of various long-tailed rodents similar to but larger than a mouse
tarany of various dark heavy viscid substances obtained as a residue
rah
ria
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
hian expression of greeting
ah
ha(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
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
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

AIRTH