cookery vs boiling

cookery and boiling both are nouns.

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

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

cookery: the act of preparing something (as food) by the application of heat
boiling: cooking in a liquid that has been brought to a boil

cookery (noun)	boiling (noun)
the act of preparing something (as food) by the application of heat	cooking in a liquid that has been brought to a boil
	the application of heat to change something from a liquid to a gas

cookery (adverb)	boiling (adverb)
	passionately or agitatedly