canal boat vs narrowboat

canal boat and narrowboat both are nouns.

Word	Noun	Adjective	Verb	Adverb
canal boat	Yes	No	No	No
narrowboat	Yes	No	No	No

As nouns, canal boat and narrowboat are synonyms defined as:

canal boat and narrowboat: a long boat that carries freight and is narrow enough to be used in canals

Other synonyms of canal boat include narrow boat.

canal boat (noun)	narrowboat (noun)
a long boat that carries freight and is narrow enough to be used in canals	a long boat that carries freight and is narrow enough to be used in canals