heliport vs drome

heliport and drome both are nouns.

Word	Noun	Adjective	Verb	Adverb
heliport	Yes	No	No	No
drome	Yes	No	No	No

As nouns, drome is a hypernym of heliport; that is, drome is a word with a broader meaning than heliport:

heliport: an airport for helicopters
drome: an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo

Other hypernyms of heliport include aerodrome, airdrome, airport.

heliport (noun)	drome (noun)
an airport for helicopters	an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo