homogamy

noun

1. (uncountable)Fertilization of a flower by pollen from the same plant.
2. (uncountable)The quality of being homogamous.
3. (uncountable)Breeding between similar individuals.
4. (uncountable)Marriage or other union between similar people, or people of the same sex.

   “Surgeons no longer pursue nurses as they did when the former were most likely men and the latter women; now they go for anaesthetists or other surgeons. In one sense homogamy is desirable, because it means women are less dependent on status-asymmetric marriages; in another, it’s dismal because it constitutes a form of social closure […]”