Experimentaly or Experimentally: How To spell?
The word Experimentaly is misspelled against Experimentally, an adverb meaning "By experiment; by experience or trial."
Experimentally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings experimenta & y which should not be misspelled with single 'L'
Wrong Spelling:  experimenta-l-y  Correct Spelling:  experimenta-ll-y 
Find more wrongly spelled words of Experimentally to spell it well.