(informal) contracted form of does (used only with the auxiliary meaning of does and only after interrogative words)
(nonstandard, sometimes proscribed)are (used mainly after where, here, and there)
Pronoun
contracted form of us (found in the formula let’s which is used to form first-person plural imperatives)
(Britain, dialect) contracted form of as (when it is (nonstandardly) used as a relative pronoun)
Particle
Possessive marker, indicating that an object belongs to the noun phrase bearing the marker.
In the absence of a specified object, used to indicate “the house/place/establishment of”.
Indicates a purpose or a user.
Suffix
(sometimes proscribed) Used to form the plurals of numerals, letters, some abbreviations and some nouns, usually because the omission of an apostrophe would make the meaning unclear or ambiguous.
(obsolete) Used to form plurals of foreign words, to clarify pronunciation, such as “banana’s” or “pasta’s”.
(proscribed) Used to form the plural of nouns that correctly take just an "s" in the plural. See greengrocer’s apostrophe.