two changes at once
lykopodeum returns nothing
The spelling is lycopodium.
two changes at once
Two letters have gone, one at each end, and either alone would be enough to break a database lookup. The reliable half of this word is the middle. Nobody misspells copod. If you can get the opening ly and the closing ium right, the rest of the name has never been in danger.
The class
Two separate decisions about the letters, both made at once.
Same name
Other spellings recorded for lycopodium
The name