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

vaincharacteristic of false pride; having an exaggerated sense of self-importance
divaa distinguished female operatic singer; a female operatic star
avid(often followed by `for') ardently or excessively desirous
vina
inia
nidia central point or locus of an infection in an organism

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
via
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

AVIDIN