The word Tulblock is misspelled against Tailblock, a noun meaning "A block with a tail. See Tail, 9."
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Word contains consecutive vowels 'AI' in between alphabets t & lblock is misspelled as 'U'
Wrong Spelling:  t-u-lblock 
Correct Spelling:  t-ai-lblock 
Check more misspelled words of Tailblock to spell it correct.