Corugation or Corrugation: How To spell?
The word Corugation is misspelled against Corrugation, a noun meaning "The act corrugating; contraction into wrinkles or alternate ridges and grooves."
Corrugation has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings co & ugation which should not be misspelled with single 'R'
Wrong Spelling:  co-r-ugation  Correct Spelling:  co-rr-ugation 
Check more misspelled words of Corrugation to spell it correct.