Twiter or Twitter: How To spell?
The word Twiter is misspelled against Twitter, a noun meaning "A half-suppressed laugh; a fit of laughter partially restrained; a titter; a giggle."
Twitter has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings twi & er which should not be misspelled with single 'T'
Wrong Spelling:  twi-t-er  Correct Spelling:  twi-tt-er 
Find more wrongly spelled words of Twitter to spell it well.