rag vs oppress

rag is a noun but oppress is not a noun.

Word	Noun	Adjective	Verb	Adverb
rag	Yes	No	Yes	No
oppress	No	No	Yes	No

As verbs, oppress is a hyponym of rag; that is, oppress is a word with a more specific, narrower meaning than rag:

Other hyponyms of rag include madden, hamstring, badger, beleaguer, bug, pester, tease, persecute.

rag (noun)	oppress (noun)
a boisterous practical joke (especially by college students)
a small piece of cloth
newspaper with half-size pages
music with a syncopated melody (usually for the piano)
a week at British universities during which side-shows and processions of floats are organized to raise money for charities

rag (verb)	oppress (verb)
break into lumps before sorting	come down on or keep down by unjust use of one's authority
censure severely or angrily	cause to suffer
harass with persistent criticism or carping
play in ragtime
treat cruelly
cause annoyance in; disturb, especially by minor irritations