houseboat?
boathouseboatloadboatmanboatswainboatyardferryboathouseboatlifeboatmotorboatrowboat
Passerby is a compound word ending in by.
Boathouse is a compound word.
there is no compound word in English ending with zebra. I looked in the dictionary.
baseballbasketballblackballbutterballcannonballcornballdirtballeyeballfireballfootballfastballfuzzballgumballhairballhandballhighballkickballmeatballmothballnetballoddballpaintballpinballracquetballscrewballsnowballsoftballspitballtarballtrackballvolleyball
Ferryboat is a compound word for a boat that transports cars and people.
A ferryboat is a compound word for a boat that carries cars and people.
If there is no significant word in a compound word, you can add the plural ending directly to the last word in the compound.
saw-boat
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!