“ECONOBOX” is a valid word. — 19 points Scrabble

onceon one occasion
bonerigid connective tissue that makes up the skeleton of vertebrates
coneany cone-shaped artifact
boona desirable state
oxendomesticated bovine animals as a group regardless of sex or age
coonan eccentric or undignified rustic
oboea slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece
ebonof a very dark black
exonsequence of a gene's DNA that transcribes into protein structures

onethe smallest whole number or a numeral representing this number
boxa (usually rectangular) container; may have a lid
bena mountain or tall hill
booa cry or noise made to express displeasure or contempt
conan argument opposed to a proposal
coxeither of two related enzymes that control the production of prostaglandins and are blocked by aspirin
coothe sound made by a pigeon
cobnut of any of several trees of the genus Corylus
noo
nobinformal term for an upper-class or wealthy person
neba long projecting or anterior elongation of an animal's head; especially the nose
eonthe longest division of geological time
obe
oxo

onin operation or operational
noa negative
bea light strong brittle grey toxic bivalent metallic element
exa man who was formerly a certain woman's husband
bo
enhalf the width of an em
nea colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
oxan adult castrated bull of the genus Bos; especially Bos taurus
oe

ECONOBOX