You can only change ONE letter, AND/OR rearrange the letters currently available. The first word is:
WINS
byre
tyre
type
tape
peat
beat
boat
tuba
abut
Baum (tree)
Maur (wall)
;-)
ream
mare
harm
mart
ramp
puma
maps
xmas
mast
most
dost (archaic)
soda
does