hermit

A religious recluse; someone who lives alone for religious reasons; an eremite.

A recluse; someone who lives alone and shuns human companionship.

Solitary the thrush, / The hermit withdrawn to himself, avoiding the settlements, / Sings by himself a song.

Millie told him he sounded like some batty hermit who lived in a cave.

A spiced cookie made with molasses, raisins, and nuts.

A hermit crab.

Because hermits are decapods and do not live within their own shells, they are not considered to be true crabs.

Any in the subfamily Phaethornithinae of hummingbirds.