Noun: bonus, focus, calculus, abacus, discus, citrus, syllabus, minus, cactus, stimulus, fungus, virus, census, walrus, surplus, Adjective: tremendous, ludicrous, enormous, numerous, devious, gorgeous, nervous, fabulous, anxious, generous, hazardous, prosperous, joyous, envious, serious,

Grammar/Spelling Connection -us/-ous

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