Bulfrog or Bullfrog: How To spell?
The word Bulfrog is misspelled against Bullfrog, a noun meaning "A very large species of frog (Rana Catesbiana), found in North America; -- so named from its loud bellowing in spring."
Bullfrog has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings bu & frog which should not be misspelled with single 'L'
Wrong Spelling:  bu-l-frog  Correct Spelling:  bu-ll-frog 
Check more misspelled words of Bullfrog to spell it correct.