kiss
a light glancing touch
there was a brief kiss of their hands in passing
buss
osculation
the act of caressing with the lips (or an instance thereof)
snog
osculate
touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.
The newly married couple kissed
She kissed her grandfather on the forehead when she entered the room
touch lightly or gently
the blossoms were kissed by the soft rain
candy kiss
any of several bite-sized candies
a cookie made of egg whites and sugar