Why are sponges and brains similar?
They both like to soak up "material"
How is a laser beam similar to a goldfish? Neither one can whistle.
Several epidemics throughout history have many similarities in characteristics.
For example, many diseases evolved from poor hygiene between animals and humans and a rise in urban population and interregional communication. Many had very similar effects and modes of transmission.

Because of the similarities, many historians are looking into allegations of these diseases stealing each other's methods, committing plague-iarism.
Why is a baseball team similar to a muffin? They both depend on the batter.
Why an astronaut can be said similar to a football player? They both strive for touchdowns!
How are a volleyball coach and a dentist similar? They both use drills.
How are waiters and blockers similar? When they do a good job, they get a big fat tip.
How are a volleyball player and a carpenter similar? They both love to hammer spikes.
Scrambled eggs are similar to a losing basketball team because both are beaten.
I get beavers and similar animals mixed up.
I otter know better.