Apogamy and Exogamy

Apogamy noun - (botany) development of an embryo without fertilization; especially the development in some ferns of a sporophyte from the gametophyte without fertilization.

Exogamy and apogamy are semantically related. In some cases you can use "Exogamy" instead a noun "Apogamy".

Exogamy noun - Marriage to a person belonging to a tribe or group other than your own as required by custom or law.

Apogamy and exogamy are semantically related. Sometimes you can replace term "Apogamy" with "Exogamy", this nouns are similar.