hybridisation vs pairing

hybridisation and pairing both are nouns.

Word	Noun	Adjective	Verb	Adverb
hybridisation	Yes	No	No	No
pairing	Yes	No	No	No

As nouns, pairing is a hypernym of hybridisation; that is, pairing is a word with a broader meaning than hybridisation:

hybridisation: (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids
pairing: the act of pairing a male and female for reproductive purposes

Other hypernyms of hybridisation include conjugation, coupling, mating, sexual union, union.

hybridisation (noun)	pairing (noun)
(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids	the act of pairing a male and female for reproductive purposes
	the act of grouping things or people in pairs