Synonyms of 'hermit'
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a person who lives in seclusion, esp a religious recluse; hermit
If you describe someone as a loner, you mean they prefer to be alone rather than with a group of people.
I'm very much a loner - I never go out.
Thesaurus for hermit from the Collins English Thesaurus
A hermit is a person who lives alone , away from people and society .