Actually, the titles differ slightly, so I think they count as two different answers.
W (without a period)
There are five other movies with this title.
W. (with a period, the recent movie about George W. Bush.)
There is one other movie with this title.
Ravenous
Silverado
Tarzan
**After 11 Rounds:
**
(Note: I couldn’t find a reference to “Highjack” so I substituted “Hijack”.)
Adaptation
Airplane!
Alfie
Alien
Aliens
Amadeus
Amistad
Annie
Arachnophobia
Arthur
Australia
Babel
Bananas
Barbarella
Batman
Beerfest
Beetlejuice
Benji
Big
Blow
Blue
Borat
Calla
Carrie
Cars
Casablanca
Cleopatra
Clerks
Coraline
Crank
Crash
Cujo
Cut
Dancing
Dangerous
Dave
Delicatessen
Deliverance
Desperation
Dick
Diner
Dinosaur
Dogma
Dumbo
Eegah!
Election
Emma
Emmanuelle
Entrapment
Equilibrium
Equus
Eragon
Euodong
Excalibur
Executioners
Failan
Fallen
Fame
Fargo
Fireproof
Firestarter
Following
Frankenstein
Friday
Fuck
Futz!
Gallipoli
Garfield
Ghostbusters
Giant
Gigi
Gigli
Girl
G-Men
Godzilla
Gorgo
Grindhouse
Hackers
Hellboy
Hellraiser
Help!
Hero
Highlander
Hijack
Hoodwinked
Hotel
House
Hud
If…
Igor
Ikiru
Inchon
Innocence
Insomnia
Intermezzo
Interview
Intolerance
Irene
Ishtar
Jabberwocky
Jack
Jade
Jarhead
Jaws
Jeffrey
JFK
Joe
Jumanji
Jumper
Juno
Kafka
Kalifornia
Kanal
Khartoum
Kickboxer
Kids
Kim
Kingpin
Kleptomania
Koyaanisqatsi
Krull
Labyrinth
Laputa
Lassie
Lenny
León
Leprechaun
Lies
Lionheart
Lolita
Loverboy
Luv
M
Madagascar
Madeleine
Mask
Matilda
Matinee
Meatballs
Metropolis
Michael
Misery
Moonraker
Nadine
Nell
Newsies
Next
Nighthawks
Nixon
Norbert
North
Nosferatu
Notorious
Nuts
O
Obsession
Octopussy
Oklahoma!
Oliver!
Once
Opium
Orange
Orgazmo
Othello
Outland
Paparazzi
Philadelphia
Pi
Platoon
Pollock
Pollyanna
Poltergeist
Porky’s
Premonition
Psycho
Push
Q
Quadrophenia
Quarantine
Quaresma
Quebec
Querelle
Quest
Quiceañera
Quicksand
Quills
Quixote
Rambo
Ran
Rashomon
Rasputin
Ratatouille
Rebecca
Rififi
Robocop
Rodan
Rope
Rounders
Saboteur
Scanners
Se7en
Shrek
Ssssss
Star!
Stardust
Sunrise
Surrogates
Suspicion
Swordfish
Tenebre
Terminator
Them
Threesome
Thunderbirds
Titanic
Tombstone
Tommy
Transformers
Tremors
Tron
U-571
Ugetsu
UltraViolet
Ulysses
Unbreakable
Underdog
Underworld
Unfaithful
Unforgiven
Untitled
Up
Valiant
Valkyrie
Valmont
Versus
Vertigo
Victory
Videodrome
Viridiana
Virtuosity
Volcano
Volunteers
W
W.
Wall-E
Wanted
WarGames
Watchmen
Water
Waterworld
Werewolf
Wilde
Wimbledon
X
X2
Xanadu
Xavier
Xchange
Xenophobia
X-Gen
X-mass
X-Men
Xtro
XXX
Y2K
Yalta
Yanks
Yellow
Yellowbeard
Yellowstone
Yentl
Yessongs
Yesterday
Yojimbo
Youngblood
Z
Zagor
Zandalee
Zardoz
Zelda
Zelig
Zentropa
Zoolander
Zoom
Zorro
Zulu!
Vendetta
Williard
Antz
Beaches
**After 11 Rounds:
**
Adaptation
Addicted
Airplane!
Alfie
Alien
Aliens
Amadeus
Amistad
Annie
Arachnophobia
Arthur
Australia
Babel
Bambi
Bananas
Barbarella
Batman
Beerfest
Beetlejuice
Benji
Big
Blow
Blue
Borat
Calla
Carrie
Cars
Casablanca
Cleopatra
Clerks
Clockers
Coraline
Crank
Crash
Cujo
Cut
Dancing
Dangerous
Dave
Delicatessen
Deliverance
Desperation
Dick
Diner
Dinosaur
Dogma
Dracula!
Dumbo
Eegah!
Election
Emma
Emmanuelle
Entrapment
Equilibrium
Equus
Eragon
Eraserhead
Euodong
Excalibur
Executioners
Failan
Fallen
Fame
Fantasia
Fargo
Fireproof
Firestarter
Following
Frankenstein
Friday
Fuck
Futz!
Gallipoli
Garfield
Ghostbusters
Giant
Gigi
Gigli
Girl
G-Men
Godzilla
Gold
Gorgo
Grindhouse
Hackers
Hellboy
Hellraiser
Help!
Hero
Hidalgo
Highlander
Hijack
Hoodwinked
Hotel
House
Hud
If…
Igor
Ikiru
Inchon
Indian
Innocence
Insomnia
Intermezzo
Interview
Intolerance
Irene
Ishtar
Jabberwocky
Jack
Jade
Jarhead
Jaws
Jeffrey
JFK
Joe
Jumanji
Jumper
Junk
Juno
Kafka
Kalifornia
Kanal
Kazaam
Khartoum
Kickboxer
Kids
Kim
Kingpin
Kleptomania
Koyaanisqatsi
Krull
Labyrinth
Laputa
Lassie
Lenny
León
Leprechaun
Lies
Lionheart
Lolita
Loser
Loverboy
Luv
M
Madagascar
Madeleine
Mask
Matilda
Matinee
Meatballs
Metropolis
Michael
Miracle
Misery
Moonraker
Nadine
Neighbors
Nell
Newsies
Next
Nighthawks
Nixon
Norbert
North
Nosferatu
Notorious
Nuts
O
Obsession
Octopussy
Oklahoma!
Oliver!
Once
Onegin
Opium
Orange
Orgazmo
Othello
Outland
Paparazzi
Philadelphia
Pi
PIN
Platoon
Pollock
Pollyanna
Poltergeist
Porky’s
Premonition
Psycho
Push
Q
Quadrophenia
Quarantine
Quaresma
Quebec
Querelle
Quest
Quiceañera
Quicksand
Quicksilver
Quills
Quixote
Rambo
Ran
Rashomon
Rasputin
Ratatouille
Ravenous
Rebecca
Rififi
Robocop
Rodan
Rope
Rounders
Saboteur
Scanners
Se7en
Shrek
Silverado
Ssssss
Star!
Stardust
Sunrise
Surrogates
Suspicion
Swordfish
Tarzan
Tenebre
Terminator
Them
Threesome
Thunderbirds
Titanic
Tombstone
Tommy
Transformers
Tremors
Tron
U-571
Ugetsu
Ultraman
UltraViolet
Ulysses
Unbreakable
Underdog
Underworld
Unfaithful
Unforgiven
Untitled
Up
Valiant
Valkyrie
Valmont
Vendetta
Versus
Vertigo
Victory
Videodrome
Viridiana
Virtuosity
Volcano
Volunteers
W
W.
Wall-E
Wanted
WarGames
Watchmen
Water
Waterworld
Werewolf
Wilde
Willard
Wimbledon
X
X-15
X2
Xanadu
Xavier
Xchange
Xenophobia
X-Gen
X-mass
X-Men
Xtro
XXX
Y2K
Yalta
Yanks
Yellow
Yellowbeard
Yellowstone
Yentl
Yessongs
Yesterday
Yojimbo
Youngblood
Youngster
Z
Zagor
Zandalee
Zardoz
Zelda
Zelig
Zentropa
Zoolander
Zoom
Zorro
Zotz!
Zulu!
**
Cabaret
**
Dragonslayer
Elf
Fitzcarraldo
Wacky!
Go
Hatari!