The word Ater is misspelled against Atter, a noun meaning "Poison; venom; corrupt matter from a sore."
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Atter has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings a & er which should not be misspelled with single 'T'
Wrong Spelling:  a-t-er 
Correct Spelling:  a-tt-er 
Explore spell check of Atter to spell without errors.