Thrumy or Thrummy: How To spell?
The word Thrumy is misspelled against Thrummy, an adjective meaning "Like thrums; made of, furnished with, or characterized by, thrums."
Thrummy has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings thru & y which should not be misspelled with single 'M'
Wrong Spelling:  thru-m-y  Correct Spelling:  thru-mm-y 
Check more misspelled words of Thrummy to spell it correct.