lifesaver
4 synonyms for lifesaver, grouped by meaning and by how common each one is.
Noun — Someone or something that saves a person's life, especially by rescue.
Synonyms
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
How to use lifesaver
The word patterns that sound natural to a native speaker.
The "hugely helpful" sense is very common in casual speech.
Etymology
A compound of life + saver, describing anyone or anything that saves a life — later extended to mean anything hugely helpful.
Full origin of lifesaver →