Dodo, judo, redo and undo are 4 letter words. They end with the letters do.
There are no English 4-letter words ending with 'has'.
There are no 4 letter words that end with 'eve'.
noah
Bird
alas
deedfeedheedneedreedseedweed
data
coolfoolpooltoolwool
barfbeefbiffbuffbumfchefcoifcuffdeafdoffduffgaffgoofguffgulfhalfhuffjiffleafloafmiff
Iraq.
Jazz.