stickup

As nouns the difference between stickup and backup

is that stickup is a robbery at gunpoint while backup is a reserve or substitute.

As an adjective backup is

standby, reserve or extra.

As nouns the difference between stickup and standup

is that stickup is a robbery at gunpoint while standup is a comedian who performs on stage.

As a verb defend

is defends, protects (3rd person singular, present tense).

As a noun stickup is

a robbery at gunpoint.

As nouns the difference between stickup and stickum

is that stickup is a robbery at gunpoint while stickum is (north america|informal) any adhesive, adhesive residue; any sticky or gummy substance.

As nouns the difference between perk and stickup

is that perk is perquisite or perk can be a percolator, particularly of coffee while stickup is a robbery at gunpoint.

As a verb perk

is shortened form of percolate or perk can be to become more lively or enthusiastic or perk can be (dated) to peer; to look inquisitively.

As an adjective perk

is smart; trim; spruce; jaunty; vain.