WordNet sense 1 (plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals):

fleur-de-lis, iris, sword lily

WordNet sense 2 (a rectangular piece of fabric used as a signalling device):

signal flag

WordNet sense 3 (a listing printed in all issues of a newspaper or magazine (usually on the editorial page) that gives the name of the publication and the names of the editorial staff, etc.):

masthead

WordNet sense 4 (flagpole used to mark the position of the hole on a golf green):

pin

WordNet sense 5 (stratified stone that splits into pieces suitable as paving stones):

flagstone

WordNet sense 6 (droop, sink, or settle from or as if from pressure or loss of tautness):

droop, sag, swag

WordNet sense 7 (become less intense):

ease up, ease off, slacken off