cross-fertilization has 1 distinct synonym spread across 2 of its 2 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is self-fertilization.
fertilization by the union of male and female gametes from different individual of the same species
interchange between different cultures or different ways of thinking that is mutually productive and beneficial
Synonyms, antonyms and the broader and narrower relations for cross-fertilization come from Princeton University’s WordNet. Full sources and licences.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
“the cross-fertilization of science and the creative arts”