“NAVAID” is a valid word. — 10 points Scrabble

vandaany of numerous showy orchids of the genus Vanda having many large flowers in loose racemes
avianpertaining to or characteristic of birds
divana long backless sofa (usually with pillows against a wall)
naiadsubmerged aquatic plant having narrow leaves and small flowers; of fresh or brackish water
vianda choice or delicious dish

vaincharacteristic of false pride; having an exaggerated sense of self-importance
nadaa quantity of no importance
divaa distinguished female operatic singer; a female operatic star
avid(often followed by `for') ardently or excessively desirous
vina

and
ainbelonging to or on behalf of a specified person (especially yourself); preceded by a possessive
vanany creative group active in the innovation and application of new concepts and techniques in a given field (especially in the arts)
aida resource
anamother of the ancient Irish gods; sometimes identified with Danu
via
ava
dina loud harsh or strident noise
aniblack tropical American cuckoo

ina unit of length equal to one twelfth of a foot
anan associate degree in nursing
ida state in the Rocky Mountains
naa silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
ada public promotion of some product or service
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

NAVAID