Postertiary or Posttertiary: How To spell?

The word Postertiary is misspelled against Posttertiary, an adjective meaning "Following, or more recent than, the Tertiary; Quaternary."

Posttertiary has double "tt" is mispronounced as "t"
Remember double 'TT' in between the strings pos & ertiary which should not be misspelled with single 'T'
Wrong Spelling: pos-t-ertiary
Correct Spelling: pos-tt-ertiary
Find more incorrect spellings of Posttertiary to spell right way.