Answer:

TWOS

Answer	Crossword Clue
TWOS	Couples
TWOS	Jefferson bills
TWOS	Rarely seen bills

TWOS	Ark numbers
TWOS	Pairs
TWOS	Terrible ...
TWOS	Noah count
TWOS	Ark passengers
TWOS	Noah's passengers
TWOS	Egg-carton columns
TWOS	Bills depicting Trumbull's "Declaration of Independence"

TWOS	"... company..."
TWOS	Ark units
TWOS	Terrible time?
TWOS	Terrible year?
TWOS	".. company ..."
TWOS	Rare bills
TWOS	Numbers for Noah
TWOS	"Terrible" age

TWOS	What Noah counted by
TWOS	Dancing units, usually
TWOS	Ark allotments
TWOS	Doublets
TWOS	They can be terrible
TWOS	Ark complements
TWOS	Ark-boarding groups
TWOS	Blue billiard balls

TWOS	"Terrible" phase
TWOS	The terrible ...
TWOS	"Terrible" ages
TWOS	Ark boarders
TWOS	Uncommon bills
TWOS	Paltry poker pair
TWOS	Blue balls
TWOS	Deuces

TWOS	"Terrible" age, it's said
TWOS	"Terrible" stage
TWOS	"....company ..."
TWOS	Terrible ....
TWOS	Small numbers