abstract
aged
alone
autumn
background
bare
bark
big
black
bough
branch
concept
crooked
crown
dead
death
deciduous
drought
dry
ecology
element
environment
fall
growth
horror
landscape
leafless
lifeless
lonely
natural
nature
old
one
outdoor
plant
rough
scary
season
shape
silhouette
single
solitude
tall
tree
trunk
unusual
white
winter
wood
wooden