The word Hyleosavr is misspelled against Hyleosaur, a noun meaning "Same as Hylaeosaur."
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Word contains consecutive vowels 'AU' in between alphabets hyleos & r is misspelled as 'AV'
Wrong Spelling:  hyleos-av-r 
Correct Spelling:  hyleos-au-r 
Find more incorrect spellings of Hyleosaur to spell right way.