Hamerhead or Hammerhead: How To spell?
The word Hamerhead is misspelled against Hammerhead, a noun meaning "A fresh-water fish; the stone-roller."
Hammerhead has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings ha & erhead which should not be misspelled with single 'M'
Wrong Spelling:  ha-m-erhead  Correct Spelling:  ha-mm-erhead 
Explore spell check of Hammerhead to spell without errors.