Answer:

AVIS

Answer	Crossword Clue
AVIS	Alongside Alamo, in some cases
AVIS	Alamo's rival
AVIS	Budget competitor

AVIS	Rara ...
AVIS	Rental giant
AVIS	Alamo rival
AVIS	Budget alternative at the airport
AVIS	Brand at an airport counter
AVIS	Rara ..
AVIS	Former ovum
AVIS	Bird, to Nero

AVIS	Hertz rival
AVIS	Car rental name
AVIS	Hertz competitor
AVIS	Car-rental company
AVIS	Rent-a-car giant
AVIS	Dollar rival
AVIS	Alamo alternative
AVIS	Bird, to Brutus

AVIS	National rival
AVIS	Thrifty competitor
AVIS	Dollar competitor
AVIS	Rent-a-car option
AVIS	"We try harder" company
AVIS	Budget alternative
AVIS	National competitor
AVIS	Enterprise competitor

AVIS	Rental company with a Wizard
AVIS	"We try harder" sloganeer
AVIS	Brutus' bird
AVIS	First rental car company to be located at an airport
AVIS	Budget rival
AVIS	Rent-a-car choice
AVIS	Alamo competitor
AVIS	Name on an airport shuttle

AVIS	Airport sign in red letters
AVIS	Car rental company founder Warren
AVIS	Rental car option
AVIS	Dollar alternative
AVIS	Its Nasdaq symbol is CAR