Heter or Heater: How To spell?

The word Heter is misspelled against Heater, a noun meaning "Any contrivance or implement, as a furnace, stove, or other heated body or vessel, etc., used to impart heat to something, or to contain something to be heated."

Heater has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets h & ter is misspelled as 'E'
Wrong Spelling:  h-e-ter 
Correct Spelling:  h-ea-ter 
Explore spell check of Heater to spell without errors.

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