opsonisation vs opsonization

opsonisation and opsonization both are nouns.

Word	Noun	Adjective	Verb	Adverb
opsonisation	Yes	No	No	No
opsonization	Yes	No	No	No

As nouns, opsonisation and opsonization are synonyms defined as:

opsonisation and opsonization: process whereby opsonins make an invading microorganism more susceptible to phagocytosis

opsonisation (noun)	opsonization (noun)
process whereby opsonins make an invading microorganism more susceptible to phagocytosis	process whereby opsonins make an invading microorganism more susceptible to phagocytosis