launch vs powerboat

launch and powerboat both are nouns.

Word	Noun	Adjective	Verb	Adverb
launch	Yes	No	Yes	No
powerboat	Yes	No	No	No

As nouns, powerboat is a hypernym of launch; that is, powerboat is a word with a broader meaning than launch:

Other hypernyms of launch include motorboat.

launch (noun)	powerboat (noun)
the act of propelling with force	a boat propelled by an internal-combustion engine
a motorboat with an open deck or a half deck

launch (verb)	powerboat (verb)
begin with vigor
propel with force
launch for the first time; launch on a maiden voyage
get going; give impetus to
smoothen the surface of
set up or found