Following are all the u-boat like words, in the list below.
PIGBOAT
100% like u-boat
SUB
99.99% like u-boat
SUBMARINE
99.98% like u-boat
BOAT
66.69% like u-boat
SUBMERSIBLE
66.62% like u-boat
UNDERSEA
66.61% like u-boat
SUBSEA
66.61% like u-boat
UNDERWATER
66.59% like u-boat
SEAMOUNT
66.56% like u-boat
E-BOAT
33.39% like u-boat
U-BOATER
33.39% like u-boat
KRIEGSMARINE
33.39% like u-boat
WOLFPACK
33.39% like u-boat
SUPERSUB
33.39% like u-boat
SUBHUNTER
33.39% like u-boat
PT BOAT
33.39% like u-boat
ARGONAUT
33.39% like u-boat
MILCH COW
33.39% like u-boat
TORPEDO BOAT
33.39% like u-boat
SUBMARINER
33.39% like u-boat
COASTAL MOTOR BOAT
33.39% like u-boat
HUNTER-KILLER
33.39% like u-boat
FRIGATE
33.39% like u-boat
POCKET BATTLESHIP
33.39% like u-boat
MYSTERY SHIP
33.39% like u-boat
GUNBOAT
33.39% like u-boat
NOVEMBER CLASS
33.39% like u-boat
WELMAN
33.39% like u-boat
SUBMARINE CHASER
33.39% like u-boat
SUBMARINISM
33.39% like u-boat
SUBMARINE RIVER
33.39% like u-boat
HYDROBOMB
33.39% like u-boat
NUKE
33.39% like u-boat
Q-SHIP
33.39% like u-boat
MOTOR TORPEDO BOAT
33.39% like u-boat
TORPEDO
33.39% like u-boat
BOATER
33.39% like u-boat
TORPEDO CRUISER
33.39% like u-boat
BOOMER
33.39% like u-boat
SUBCHASER
33.39% like u-boat
VIKING SHIP
33.39% like u-boat
SUB TENDER
33.39% like u-boat
BUMBOAT
33.39% like u-boat
TORPEDO RAM
33.39% like u-boat
MOUSETRAP
33.39% like u-boat
LANDING SHIP, TANK
33.39% like u-boat
BATEAU
33.39% like u-boat
UNA BOAT
33.39% like u-boat
HIGGINS BOAT
33.39% like u-boat
AUTOSUB
33.39% like u-boat
PRIVATE SHIP
33.39% like u-boat
SUBMARINING
33.39% like u-boat
BATTLESHIP
33.39% like u-boat
GUNBOATER
33.39% like u-boat
MAN-OF-WAR
33.39% like u-boat
BLUE-WATER NAVY
33.39% like u-boat
DREADNOUGHT
33.39% like u-boat
FISH
33.39% like u-boat
LAND BATTLESHIP
33.39% like u-boat
BUBBLE-HEAD
33.39% like u-boat
MOTORBOAT
33.39% like u-boat
CORVETTE
33.39% like u-boat
DESTROYER
33.39% like u-boat
SAILING VESSEL
33.39% like u-boat
UNDERBOTTOM
33.39% like u-boat
SEABOAT
33.39% like u-boat
DREADNAUGHT
33.39% like u-boat
SPLINTER FLEET
33.39% like u-boat
BOATIE
33.39% like u-boat
SEACRAFT
33.39% like u-boat
COCKBOAT
33.39% like u-boat
CRASH BOAT
33.39% like u-boat
WATERCRAFT
33.39% like u-boat
BOMB SHIP
33.39% like u-boat
TORPEDO TUBE
33.39% like u-boat
FIRST-RATE
33.39% like u-boat
SOUCOUPE
33.39% like u-boat
BOATE
33.39% like u-boat
TORPEDOIST
33.39% like u-boat
WELL-BOAT
33.39% like u-boat
MARINE
33.39% like u-boat
ASSEMBLY SHIP
33.39% like u-boat
UNDERWAY
33.39% like u-boat
BOW PLANE
33.39% like u-boat
SWIFTBOAT
33.39% like u-boat
WHALEBOAT
33.39% like u-boat
TORPEDO CATCHER
33.39% like u-boat
DINETTE
33.39% like u-boat
TUGBOAT
33.39% like u-boat
NARCOSUB
33.39% like u-boat
SAIL
33.39% like u-boat
VESSEL
33.39% like u-boat
POLICEBOAT
33.39% like u-boat
JETBOAT
33.39% like u-boat
SURFACE COMBATANT
33.39% like u-boat
BATTLEWAGON
33.39% like u-boat
AUXILIARY CRUISER
33.39% like u-boat
SPEARGUN
33.39% like u-boat
TOWBOAT
33.39% like u-boat
TUG-BOAT
33.39% like u-boat
