Synonyms of 'guarantor'
underwriterDictionary, guarantee, supporter
They told him he needed to find a guarantor to back him.
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A backer is someone who helps or supports a project, organization, or person, often by giving or lending money.
I was looking for a backer to assist me in the attempted buy-out.
A sponsor is a person or organization that sponsors something or someone.
the new sponsors of the League Cup
Thesaurus for guarantor from the Collins English Thesaurus
A guarantor is a person who gives a guarantee or who is bound by one.