infiltrator
3 synonyms for infiltrator, grouped by meaning and by how common each one is.
Noun — A person who secretly joins a group or enters a place in order to spy on it.
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.
