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

Oyster is spelled as After English to Urdu translation of Oyster, If you have issues in pronunciation than you can hear the audio of it in the online

pronunciation of English adjectives in -ous and the English pronunciation of ouster , n [ K OF ouster , inf used as noun : see

ouster pronunciation Historical Dictionary: When a word was first coined, what was its spelling and meaning during the first coinage, when did its spelling, pronunciation and

ouster sdk 2 syllables: OW + stuh Test your pronunciation on words that have sound similarities with 'ouster':