lactation vs feeding

lactation and feeding both are nouns.

Word	Noun	Adjective	Verb	Adverb
lactation	Yes	No	No	No
feeding	Yes	No	No	No

As nouns, feeding is a hypernym of lactation; that is, feeding is a word with a broader meaning than lactation:

Other hypernyms of lactation include alimentation.

lactation (noun)	feeding (noun)
feeding an infant by giving suck at the breast	the act of consuming food
the production and secretion of milk by the mammary glands	the act of supplying food and nourishment
the period following birth during which milk is secreted