The difference between Catamaran and Multihull

When used as nouns, catamaran means a twin-hulled ship or boat, whereas multihull means a boat with two or more hulls.

check bellow for the other definitions of Catamaran and Multihull

Catamaran as a noun:

A twin-hulled ship or boat.
Catamaran as a noun (colloquial, rare, obsolete):

A quarrelsome woman; a scold.
Catamaran as a noun (obsolete):

A raft of three pieces of wood lashed together, the middle piece being longer than the others, and serving as a keel on which the rower squats while paddling.
Catamaran as a noun (obsolete):

An old kind of fireship.