tower vs towboat

tower and towboat both are nouns.

Word	Noun	Adjective	Verb	Adverb
tower	Yes	No	Yes	No
towboat	Yes	No	No	No

As nouns, tower and towboat are synonyms defined as:

tower and towboat: a powerful small boat designed to pull or push larger ships

Other synonyms of tower include tug, tugboat.

tower (noun)	towboat (noun)
a structure taller than its diameter; can stand alone or be attached to a larger building	a powerful small boat designed to pull or push larger ships
anything that approximates the shape of a column or tower
a powerful small boat designed to pull or push larger ships

tower (verb)	towboat (verb)
appear very large or occupy a commanding position