bulletproof

As adjectives the difference between impenetrable and bulletproof

is that impenetrable is not penetrable while bulletproof is capable of withstanding a direct shot by a bullet fired from a gun.

As a verb bulletproof is

to make proof against bullets.

As adjectives the difference between bulletproof and impervious

is that bulletproof is (of a material) capable of withstanding a direct shot by a bullet fired from a gun while impervious is unaffected or unable to be affected by.

As a verb bulletproof

is to make proof against bullets.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective bulletproof is

(of a material) capable of withstanding a direct shot by a bullet fired from a gun.

As a verb bulletproof is

to make proof against bullets.

As adjectives the difference between bulletproof and ballproof

is that bulletproof is (of a material) capable of withstanding a direct shot by a bullet fired from a gun while ballproof is incapable of being penetrated by balls from firearms; bulletproof.

As a verb bulletproof

is to make proof against bullets.

As adjectives the difference between bulletproof and knaveproof

is that bulletproof is (of a material) capable of withstanding a direct shot by a bullet fired from a gun while knaveproof is for a system or body: protected, or designed to be proof against misuse or error; fail-safe.

As a verb bulletproof

is to make proof against bullets.