Digama or Digamma: How To spell?

The word Digama is misspelled against Digamma, a noun meaning "A letter (/, /) of the Greek alphabet, which early fell into disuse."

Digamma has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings diga & a which should not be misspelled with single 'M'
Wrong Spelling:  diga-m-a 
Correct Spelling:  diga-mm-a 
Find more wrongly spelled words of Digamma to spell it well.

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