An example would be "I spelt the word 'thread' for the spelling bee". Spelt is past tense, and indeed an older usage of spelled. Misspelt would mean that the word was not spelt correctly.
The correct spelling for the Italian word meaning faces is spelt "Facce"
The word is spelled "spelling", just as you spelled it.
The word is spelled "evidently" (meaning apparently).
The word is spelled volume, just as you spelled it.
The word is spelt as you have in the question.
The word meaning "a member of the family" is spelt relative.
The word typically is spelled correctly, meaning normally or usually.
The word is spelled dumbo. It is a derogatory word, meaning stupid, slow, foolish, or dumb.
any
The word is spelled Oklahoma, just as you spelled it.
The spelling is "significant" (notable, or having some bearing).
The word heart is not spelled "haert". That is probably just a spelling mistake by someone. Someone just reversed the "a" and the "e" by mistake. That is easy to do when typing.