Definition of polyonymy in US English:

polyonymy

(also polyonomy)

noun

  • The use of several different names for the same person or thing; variety of names or titles.

Origin

Late 17th century; earliest use found in Ralph Cudworth (1617–1688), philosopher and theologian. From ancient Greek πολυωνυμία a multitude of names from πολυώνυμος + -ία; compare -onymy.

Pronunciation

polyonymy

/ˌpɒlɪˈɒnɪmi/