undercover
6 synonyms and 1 antonym for undercover, grouped by meaning and by how common each one is.
Adjective — Carried out secretly, especially as part of an investigation.
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.
Antonyms
How to use undercover
The word patterns that sound natural to a native speaker.
Etymology
From under + cover, in the sense of "hidden."
Full origin of undercover →