cooking vs poaching

cooking and poaching both are nouns.

Word	Noun	Adjective	Verb	Adverb
cooking	Yes	No	No	No
poaching	Yes	No	No	No

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

cooking: the act of preparing something (as food) by the application of heat
poaching: cooking in simmering liquid

cooking (noun)	poaching (noun)
the act of preparing something (as food) by the application of heat	cooking in simmering liquid