breeding vs generation

breeding and generation both are nouns.

Word	Noun	Adjective	Verb	Adverb
breeding	Yes	Yes	No	No
generation	Yes	No	No	No

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

breeding: the sexual activity of conceiving and bearing offspring
generation: the act of producing offspring or multiplying by such production

Other hyponyms of breeding include crossbreeding, interbreeding, miscegenation, multiplication, propagation.

breeding (noun)	generation (noun)
the sexual activity of conceiving and bearing offspring	the act of producing offspring or multiplying by such production
helping someone grow up to be an accepted member of the community	the production of heat or electricity
the production of animals or plants by inbreeding or hybridization	a coming into being
the result of good upbringing (especially knowledge of correct social behavior)	group of genetically related organisms constituting a single step in the line of descent
elegance by virtue of fineness of manner and expression	all the people living at the same time or of approximately the same age
	the normal time between successive generations
	a stage of technological development or innovation

breeding (adjective)	generation (adjective)
producing offspring or set aside especially for producing offspring