Oh, my word, yes. Many major battles, especially in the Pacific, involved ships of every kind, including carriers. See links.
"Liberty ships" .
to fight the Axis' navy
The Germans believed the ships were carrying war supplies to the Allies.
"Loose Lips sinks Ships".
To sink ships.
yes
By troop ships.
Portugal was neutral during World War II so didn't fight anyone.
Yes Mr. Churchill did fight during World War II, not only on the battlefield, but also with speeches.
Hospital ships and standard transports (Victory and Liberty ships).
US and Canadian shipyards produced 2,710 Liberty Ships for the war effort.
Lusitania