fertilization vs fertilisation

fertilization and fertilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
fertilization	Yes	No	No	No
fertilisation	Yes	No	No	No

As nouns, fertilization and fertilisation are synonyms defined as:

fertilization and fertilisation: creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant

Other synonyms of fertilization include fecundation, impregnation.

As nouns, fertilization and fertilisation are synonyms defined as:

fertilization and fertilisation: making fertile as by applying fertilizer or manure

Other synonyms of fertilization include dressing, fecundation.

fertilization (noun)	fertilisation (noun)
creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant	creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant
making fertile as by applying fertilizer or manure	making fertile as by applying fertilizer or manure