supersedure: act of replacing one person or thing by another especially one held to be superior
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
niger-kordofanian: the family of languages that includes most of the languages spoken in Africa south of the Sahara; the majority of them are tonal languages but there are important exceptions (e.g., Swahili or Fula)