As nouns the difference between chiefdom and chieftain
is that chiefdom is an area or region governed by a chief while chieftain is a leader of a clan or tribe.
chiefdom
English
Noun
(
en noun)
An area or region governed by a chief.
(anthropology) A society larger than a tribe but smaller or simpler than a state.
chieftain
English
Noun
(
en noun)
A leader of a clan or tribe.
A leader of a group, e.g. a robbers' chieftain.
Synonyms
* (A very powerful person) chief, big gun, big shot, big wheel, bigwig, boss, employer, foreman, head, heid bummer, leader, mandarin, manager, mover and shaker, top banana, top dog, tycoon