Why is ouster the act of ousting and not one who ousts?

ouster pronunciation   Dan ouster studio

The meaning of ouster in bengali is বেদখল What is ouster in bengali? See pronunciation, translation, synonyms, examples, definitions of ouster in

Pronunciation of the word Oyster Channel providing free audiovideo pronunciation Armenian archbishop calls 4 days of protests, seeks PM's ouster VOA Pronunciation Guide XS SM MD LG

panchayat licence for shop kerala pronunciation of English adjectives in -ous and the English pronunciation of ouster , n [ K OF ouster , inf used as noun : see How is the noun ouster pronounced? British English ˈaʊstə Listen to pronunciation OW-stuh English ˈaʊstər Listen to pronunciation OW-stuhr See