breeding season vs mating season

breeding season and mating season both are nouns.

Word	Noun	Adjective	Verb	Adverb
breeding season	Yes	No	No	No
mating season	Yes	No	No	No

As nouns, breeding season and mating season are synonyms defined as:

breeding season and mating season: The breeding season is the most suitable season, usually with favourable conditions and abundant food and water, for breeding.

breeding season (noun)	mating season (noun)
The breeding season is the most suitable season, usually with favourable conditions and abundant food and water, for breeding.	The breeding season is the most suitable season, usually with favourable conditions and abundant food and water, for breeding.