dihybrid cross vs crossbreeding

dihybrid cross and crossbreeding both are nouns.

Word	Noun	Adjective	Verb	Adverb
dihybrid cross	Yes	No	No	No
crossbreeding	Yes	No	No	No

As nouns, crossbreeding is a hypernym of dihybrid cross; that is, crossbreeding is a word with a broader meaning than dihybrid cross:

dihybrid cross: hybridization using two traits with two alleles each
crossbreeding: (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids

Other hypernyms of dihybrid cross include cross, crossing, hybridisation, hybridization, hybridizing, interbreeding.

dihybrid cross (noun)	crossbreeding (noun)
hybridization using two traits with two alleles each	(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
	reproduction by parents of different races (especially by white and non-white persons)