The correct spelling of the phrase "are authority" is /ɑːr ɔːˈθɒrɪti/, with the emphasis on the second syllable. The word "are" is spelled with the letter "a" and the letter "r" is used to show the pronunciation of the long "a" sound. "Authority" is spelled with the letters "a-u-t-h-o-r-i-t-y", and the "th" sound is represented by the letters "t-h". It is important to spell words properly to effectively communicate ideas and thoughts in written communication.