sentinel
7 synonyms for sentinel, grouped by meaning and by how common each one is.
Noun — A person or animal that stands guard or keeps watch.
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
First recorded in the 1570s, from Middle French sentinelle, ultimately from Italian sentire, "to perceive or watch," from Latin sentiō, "to feel."
Full origin of sentinel →