Open English Wordnet
Nouns
(n)impregnationmaterial with which something is impregnated“the impregnation, whatever it was, had turned the rock blue”
(n)impregnation, saturationthe process of totally saturating something with a substance“the impregnation of wood with preservative”, “the saturation of cotton with ether”
(n)fertilization, fertilisation, fecundation, impregnationcreation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant