lactation vs alimentation

lactation and alimentation both are nouns.

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

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

Other hypernyms of lactation include feeding.

lactation (noun)	alimentation (noun)
feeding an infant by giving suck at the breast	the act of supplying food and nourishment
the production and secretion of milk by the mammary glands	a source of materials to nourish the body
the period following birth during which milk is secreted