Synonyms:
* Scaffold: This is a more formal word for a platform used for execution.
* Gibbet: This refers specifically to a structure with a projecting arm for hanging a body.
* Hangman's tree: This refers to a tree used for hanging, often in a more informal setting.
Antonyms:
* Life: This is a general antonym, as the gallows is associated with death.
* Mercy: This is an antonym in the sense that the gallows represents the opposite of mercy.
* Redemption: This is a more abstract antonym, representing a state of being saved from punishment or death.
* Freedom: This is an antonym as the gallows represents a loss of freedom.
It's important to consider the specific context when choosing a synonym or antonym for "gallows," as the appropriate word will depend on the intended meaning.