The word Thining is misspelled against Thinning, which is present continuous of "Thin"
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Thinning has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings thi & ing which should not be misspelled with single 'N'
Wrong Spelling: thi-n-ing
Correct Spelling: thi-nn-ing
Find more wrongly spelled words of Thinning to spell it well.