oppression vs subjugation

oppression and subjugation both are nouns.

Word	Noun	Adjective	Verb	Adverb
oppression	Yes	No	No	No
subjugation	Yes	No	No	No

As nouns, oppression and subjugation are synonyms defined as:

As nouns, subjugation is a hypernym of oppression; that is, subjugation is a word with a broader meaning than oppression:

oppression: the state of being kept down by unjust use of force or authority:
subjugation: forced submission to control by others

Other hypernyms of oppression include subjection.

oppression (noun)	subjugation (noun)
the act of subjugating by cruelty	the act of conquering
a feeling of being oppressed	the act of subjugating by cruelty
the state of being kept down by unjust use of force or authority:	forced submission to control by others