hydroplane vs speedboat

hydroplane and speedboat both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydroplane	Yes	No	Yes	No
speedboat	Yes	No	No	No

As nouns, speedboat is a hypernym of hydroplane; that is, speedboat is a word with a broader meaning than hydroplane:

hydroplane: a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds
speedboat: a fast motorboat

hydroplane (noun)	speedboat (noun)
an airplane that can land on or take off from water	a fast motorboat
a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds

hydroplane (verb)	speedboat (verb)
glide on the water in a hydroplane