ctrl+f3 = look up word under cursor (forward)
shift+f3 = look up word under cursor (backwards)
alt +f3 = select all occurrences of word under cursor
ctrl+i = incremental search
ctrl+shift+i = reverse incremental search
ctrl+e = copy word under cursor in find textfield
ctrl+shift+e = copy word under cursor in replace textfield
These 2 above wont open the find/replace panel so do ctrl+f (for find only) or ctrl+h (for find&replace) you will see the words there.