Federalism
Blackmail airmail
best friend
The last word lol
Asunder. It has the words "as" and "under", so it is made up of two individual words, making it a compound word.
Passerby is a compound word ending in by.
there is no compound word in English ending with zebra. I looked in the dictionary.
baseballbasketballblackballbutterballcannonballcornballdirtballeyeballfireballfootballfastballfuzzballgumballhairballhandballhighballkickballmeatballmothballnetballoddballpaintballpinballracquetballscrewballsnowballsoftballspitballtarballtrackballvolleyball
If there is no significant word in a compound word, you can add the plural ending directly to the last word in the compound.
If there is no single significant word in a compound word, add the plural ending to both parts of the compound word.
One example of a compound word ending with "heat" is "heartbeat."
One compound word ending with by is......... Driveby!
If I'm not mistaken, REACT is a compound word.
The word is inservice.
houseboat?
housekeeper
there is no compound word in English ending with zebra. I looked in the dictionary.