sw

As a proper noun marsh

is for someone living by a (marsh).

As a letter h

is the eighth letter of the.

As a symbol h

is (label) symbol for hydrogen.

As a noun address

is direction or superscription of a letter, or the name, title, and place of residence of the person addressed.

As a verb address

is (obsolete) to prepare oneself.

As an initialism app is

actinobacllus pleuropneumoniae.

As a noun sweetie

is {{cx|often as a term of address|lang=en}} A person who is much loved.

As an initialism SW is

search Warrant.