flatboat vs wherry

flatboat and wherry both are nouns.

Word	Noun	Adjective	Verb	Adverb
flatboat	Yes	No	No	No
wherry	Yes	No	No	No

As nouns, wherry is a hyponym of flatboat; that is, wherry is a word with a more specific, narrower meaning than flatboat:

Other hyponyms of flatboat include dredger, houseboat, pontoon, scow, Norfolk wherry.

flatboat (noun)	wherry (noun)
a flatbottom boat for carrying heavy loads (especially on canals)	light rowboat for use in racing or for transporting goods and passengers in inland waters and harbors
	sailing barge used especially in East Anglia