Incorrect spelling, explanation: this form is incorrect, because according to the rule when we add a suffix to a word ending with a consonant-vowel-consonant combination, we should double the last consonant. Therefore god plus -ess is goddess, not godess. D should be doubled in this case, so goddess is the correct form.

Correct spelling, explanation: goddess is the correct form as it is using the rule of doubling the last consonant when adding a suffix, in case the word is ending with two consonants with a vowel between them. Here there is a word god with the suffix -ess (meaning a female version of the given noun), so we receive the word goddess (doubling d), not godess.

Definition of goddess:
noun, in polytheistic religions a female deity
Kali, a Hindu goddess of death, is usually depicted with black or dark blue skin.
In famous European museums, you can see many statues of goddesses, like goddess Nike in the Louvre.