vapour vs boiling

vapour and boiling both are nouns.

Word	Noun	Adjective	Verb	Adverb
vapour	Yes	No	No	No
boiling	Yes	No	No	Yes

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

Other hyponyms of vapour include clouding, clouding up, smoke, smoking.

vapour (noun)	boiling (noun)
the process of becoming a vapor	cooking in a liquid that has been brought to a boil
a visible suspension in the air of particles of some substance	the application of heat to change something from a liquid to a gas

vapour (adverb)	boiling (adverb)
	passionately or agitatedly