# sustainer

> English word · Noun · frequency rank #88,903

## Definitions
1. A person or thing that sustains.
2. A rocket engine that remains with a spacecraft during its ascent after the separation of the booster engines.
3. A person who makes regular donations, especially to a public radio or television station.
4. A radio program without a commercial sponsor.

## Etymology
From sustain + -er.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sustainer