Gruber or Grubber: How To spell?
The word Gruber is misspelled against Grubber, a noun meaning "One who, or that which, grubs; especially, a machine or tool of the nature of a grub ax, grub hook, etc."
Grubber has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Gru & er which should not be misspelled with single 'B'
Wrong Spelling:  Gru-b-er  Correct Spelling:  Gru-bb-er 
Check more misspelled words of Grubber to spell it correct.