Iregularity or Irregularity: How To spell?
The word Iregularity is misspelled against Irregularity, a noun meaning "The state or quality of being irregular; that which is irregular."
Irregularity has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings i & egularity which should not be misspelled with single 'R'
Wrong Spelling:  i-r-egularity  Correct Spelling:  i-rr-egularity 
Check more misspelled words of Irregularity to spell it correct.