"startle" in the noun sense
1. startle, jump, start
a sudden involuntary movement
"he awoke with a start"
"startle" in the verb sense
1. startle, galvanize, galvanise
to stimulate to action
"the loud noise startled him awake"
"galvanized into action"
2. startle, jump, start
move or jump suddenly, as if in surprise or alarm
"She startled when I walked into the room"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License