mouth

As a letter s

is the letter s with a.

As a noun mouth is

(anatomy) the opening of a creature through which food is ingested.

As a verb mouth is

to speak; to utter.

As nouns the difference between mouth and null

is that mouth is (anatomy) the opening of a creature through which food is ingested while null is zero, nil; the cardinal number before einn.

As a verb mouth

is to speak; to utter.

As nouns the difference between tail and mouth

is that tail is while mouth is (anatomy) the opening of a creature through which food is ingested.

As a verb mouth is

to speak; to utter.

As nouns the difference between mouth and shirt

is that mouth is (anatomy) the opening of a creature through which food is ingested while shirt is an article of clothing that is worn on the upper part of the body, and often has sleeves, either long or short, that cover the arms.

As verbs the difference between mouth and shirt

is that mouth is to speak; to utter while shirt is to cover or clothe with a shirt, or as if with a shirt.

As nouns the difference between mouth and talk

is that mouth is (anatomy) the opening of a creature through which food is ingested while talk is talc.

As a verb mouth

is to speak; to utter.

As nouns the difference between mouth and mouthes

is that mouth is (anatomy) the opening of a creature through which food is ingested while mouthes is (archaic|dialectal).

As verbs the difference between mouth and mouthes

is that mouth is to speak; to utter while mouthes is (archaic|dialectal) (mouth).

As a noun mouth

is (anatomy) the opening of a creature through which food is ingested.

As a verb mouth

is to speak; to utter.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a noun mouth

is (anatomy) the opening of a creature through which food is ingested.

As a verb mouth

is to speak; to utter.

As an adjective undefined is

lacking a definition or value.