abstract
action
age
alarm
appreciate
background
cherish
clock
concept
conceptual
countdown
deadline
death
design
disappear
disappearing
dissolve
dissolving
expire
flow
forward
future
green
hour
lack
late
life
lifetime
metaphor
object
particles
pass
passing
past
running
speed
spent
stream
ticking
time
timer
top
treasure
turquoise
urgency
value
vanishing
view
waste