Superstren or Superstrain: How To spell?
The word Superstren is misspelled against Superstrain, a verb meaning "To overstrain."
Word contains consecutive vowels 'AI' in between alphabets superstr & n is misspelled as 'E'Wrong Spelling:  superstr-e-n  Correct Spelling:  superstr-ai-n 
Check more misspelled words of Superstrain to spell it correct.