fertilisation vs enrichment

fertilisation and enrichment both are nouns.

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

As nouns, enrichment is a hypernym of fertilisation; that is, enrichment is a word with a broader meaning than fertilisation:

fertilisation (noun)	enrichment (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	act of making fuller or more meaningful or rewarding
making fertile as by applying fertilizer or manure	a gift that significantly increases the recipient's wealth