visor

As a letter s

is the letter s with a.

As a noun visor is

a part of a helmet, arranged so as to lift or open, and so show the face the openings for seeing and breathing are generally in it.

As nouns the difference between visor and windshield

is that visor is a part of a helmet, arranged so as to lift or open, and so show the face the openings for seeing and breathing are generally in it while windshield is (north america) a transparent screen made of glass, located at the front and back of a vehicle in front of its occupants to protect them from the wind and weather.

As a verb windshield is

to install a windshield on.

As a noun visor

is a part of a helmet, arranged so as to lift or open, and so show the face the openings for seeing and breathing are generally in it.

As a proper noun glass is

.

As nouns the difference between visor and star

is that visor is a part of a helmet, arranged so as to lift or open, and so show the face the openings for seeing and breathing are generally in it while star is star.

As nouns the difference between visor and bill

is that visor is a part of a helmet, arranged so as to lift or open, and so show the face the openings for seeing and breathing are generally in it while bill is car (motorcar, automobile).

As nouns the difference between mask and visor

is that mask is a cover, or partial cover, for the face, used for disguise or protection or mask can be a mesh or mask can be mash while visor is a part of a helmet, arranged so as to lift or open, and so show the face the openings for seeing and breathing are generally in it.

As a verb mask

is to cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor or mask can be to mash or mask can be to bewilder; confuse.