pollination vs impregnation

pollination and impregnation both are nouns.

Word	Noun	Adjective	Verb	Adverb
pollination	Yes	No	No	No
impregnation	Yes	No	No	No

As nouns, impregnation is a hypernym of pollination; that is, impregnation is a word with a broader meaning than pollination:

pollination: transfer of pollen from the anther to the stigma of a plant
impregnation: 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 hypernyms of pollination include fecundation, fertilisation, fertilization.

pollination (noun)	impregnation (noun)
transfer of pollen from the anther to the stigma of 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
	the process of totally saturating something with a substance
	material with which something is impregnated