hydroplane vs seaplane

hydroplane and seaplane both are nouns.

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

As nouns, hydroplane and seaplane are synonyms defined as:

hydroplane and seaplane: an airplane that can land on or take off from water

As verbs, hydroplane and seaplane are synonyms defined as:

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

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