Thermaly or Thermally: How To spell?

The word Thermaly is misspelled against Thermally, an adverb meaning "In a thermal manner."

Thermally has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings therma & y which should not be misspelled with single 'L'
Wrong Spelling:  therma-l-y 
Correct Spelling:  therma-ll-y 
Explore spell check of Thermally to spell without errors.