What does "-or" mean?

Creates an agent noun, often from a verb, indicating a person or object (often machines or parts of them) that do the verb or part of speech with which they are formed.

What is a synonym for "-or"?

Common synonyms include: er, ster.

-or

//ə// suffix

suffix ·Rare ·Advanced level

Definitions

Suffix

1
Creates an agent noun, often from a verb, indicating a person or object (often machines or parts of them) that do the verb or part of speech with which they are formed. morpheme
"settle + -or → settlor"
2
Used to form nouns of quality, state, or condition. morpheme
"err + -or → error"
3
Appended to the names of members of classes of components, especially those that have an extensive property name of the same root suffixed with -ance morpheme
"Resistors possess resistance and inductors possess inductance."