Heirthstone or Hearthstone: How To spell?

The word Heirthstone is misspelled against Hearthstone, a noun meaning "Stone forming the hearth; hence, the fireside; home."

Hearthstone has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets h & rthstone is misspelled as 'EI'
Wrong Spelling:  h-ei-rthstone 
Correct Spelling:  h-ea-rthstone 
Find more incorrect spellings of Hearthstone to spell right way.

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