Collective nouns for umbrellas

Collective noun for umbrellas	usage
phalanx	A phalanx of umbrellas
spawn	A spawn of umbrellas

Collective nouns list

Subject	Collective noun
umbrellas	A phalanx of umbrellas
under achievers	A drowse of under achievers
undertakers	An unction (or extreme unction) of undertakers
unicorns	A blessing, glory, or marvel of unicorns
urologists	A void of urologists
used car salesmen	A great deal of used car salesmen
ushers	A set of ushers