promisor promisingness • promissionary · · · Info · Definitions · Synonyms · Characters · · promisor · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a person who makes a promise. Synonyms: promiser. · · Noun Definition 1 Synonyms · · · promiser · · Synonym 1 Characters · · i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073