steam engine vs steamer

steam engine and steamer both are nouns.

Word	Noun	Adjective	Verb	Adverb
steam engine	Yes	No	No	No
steamer	Yes	No	Yes	No

steam engine (noun)	steamer (noun)
external-combustion engine in which heat is used to raise steam which either turns a turbine or forces a piston to move up and down in a cylinder	an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe
	a ship powered by one or more steam engines
	a cooking utensil that can be used to cook food by steaming it
	a clam that is usually steamed in the shell

steam engine (verb)	steamer (verb)
	travel by means of steam power