doubter doubtedly • doubtful · · · Info · Definitions · Synonyms · Characters · · doubter · · Text Latin · · Script 7 · · Length Definitions · · · (noun) someone who habitually doubts accepted beliefs. Synonyms: skeptic, sceptic. · · Noun Definition 1 (noun) someone who is doubtful or noncommittal about something. Synonyms: agnostic. · · Noun Definition 2 Synonyms · · · skeptic · · Synonym 1 sceptic · · Synonym 2 agnostic · · Synonym 3 Characters · · b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075