Dvandva

Dvāndva [ˈdvɑːndvə] is a compound in which there is a simple conjunction of two words, without any further dependency holding between them, so each element could be head.

Examples

 * Austria-Hungary
 * freeze-dry
 * Bosnia-Herzegovina
 * mother-child''
 * and possibly, player-coach.

Synonyms

 * copulative compound

Origin
Dvāndva arose by reduplication of the word dva ‘two’.

Link
Utrecht Lexicon of Linguistics