Both are a play on words.
An Orca-stra.
Because it's all play.
A graduated cylinder. This is the only joke I've ever thought of.
Cause she was too big for B- shells! (my 6 year old niece likes to tell this joke)
Because they don't know the words.
Screw it. EDIT: has a better answer
Thesaurus.
He had an antonym.