Synonyms of 'surrogate'
a person or thing acting as a substituteLeningrad was the third alien city to offer him a surrogate home.
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in the sense of deputy
a person appointed to act on behalf of another
France's minister for culture and his deputy attended the meeting.
in the sense of proxy
a person authorized to act on behalf of someone else
She sent him as her proxy to board meetings.
Thesaurus for surrogate from the Collins English Thesaurus