“PITAPAT” is a valid word. — 11 points Scrabble

tipthe extreme end of something; especially something pointed
pita sizeable hole (usually in the ground)
patthe sound made by a gentle blow
tapthe sound made by a gentle blow
app
titeither of two soft fleshy milk-secreting glandular organs on the chest of a woman
pipa disease of poultry
tattastelessness by virtue of being cheap and vulgar
apt(usually followed by `to') naturally disposed toward
piaperennial herb of East Indies to Polynesia and Australia; cultivated for its large edible root yielding Otaheite arrowroot starch
papworthless or oversimplified ideas
att
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
paan informal term for a father; probably derived from baby talk
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
pithe ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
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

PITAPAT