amphimixis vs sexual reproduction

amphimixis and sexual reproduction both are nouns.

Word	Noun	Adjective	Verb	Adverb
amphimixis	Yes	No	No	No
sexual reproduction	Yes	No	No	No

As nouns, amphimixis and sexual reproduction are synonyms defined as:

amphimixis and sexual reproduction: reproduction involving the union or fusion of a male and a female gamete

amphimixis (noun)	sexual reproduction (noun)
union of sperm and egg in sexual reproduction	reproduction involving the union or fusion of a male and a female gamete
reproduction involving the union or fusion of a male and a female gamete