supergrass
5 synonyms for supergrass, grouped by meaning and by how common each one is.
Noun — An informant who supplies the police with large amounts of information about criminal or terrorist activity.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Etymology
Formed from super- and grass, with grass here meaning “an informer”.
Full origin of supergrass →