Synonyms of 'sanctum'
1 refugeDictionary, retreat, den (US)
His bedroom is his inner sanctum.
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The walls of his den were covered in posters.
Police raided a house used as the movement's hideout.
Thesaurus for sanctum from the Collins English Thesaurus
If you refer to someone's inner sanctum , you mean a room which is private and sometimes secret , where they can be quiet and alone .