pustule

As a letter s

is the letter s with a.

As a noun pustule is

a small accumulation of pus in the epidermis or dermis.

As nouns the difference between pustule and null

is that pustule is a small accumulation of pus in the epidermis or dermis while null is zero, nil; the cardinal number before einn.

As a noun pustule

is a small accumulation of pus in the epidermis or dermis.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between acne and pustule

is that acne is acne while pustule is a small accumulation of pus in the epidermis or dermis.

As nouns the difference between pock and pustule

is that pock is a pus filled swelling on the surface on the skin caused by an eruptive disease while pustule is a small accumulation of pus in the epidermis or dermis.

As a verb pock

is to scar or mark with pits.

As nouns the difference between ulcer and pustule

is that ulcer is (pathology) an open sore of the skin, eyes or mucous membrane, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection while pustule is a small accumulation of pus in the epidermis or dermis.

As nouns the difference between blister and pustule

is that blister is a small bubble between the layers of the skin that contains watery or bloody fluid and is caused by friction and pressure, burning, freezing, chemical irritation, disease or infection while pustule is a small accumulation of pus in the epidermis or dermis.

As a verb blister

is to cause blisters to form.

As nouns the difference between pustule and vesicles

is that pustule is a small accumulation of pus in the epidermis or dermis while vesicles is .

As nouns the difference between vesicle and pustule

is that vesicle is a membrane-bound compartment found in a cell while pustule is a small accumulation of pus in the epidermis or dermis.