Swalowwort or Swallowwort: How To spell?
The word Swalowwort is misspelled against Swallowwort, a noun meaning "A poisonous plant (Vincetoxicum officinale) of the Milkweed family, at one time used in medicine; -- also called white swallowwort."
Swallowwort has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings swa & owwort which should not be misspelled with single 'L'
Wrong Spelling:  swa-l-owwort  Correct Spelling:  swa-ll-owwort 
Find more incorrect spellings of Swallowwort to spell right way.