crude oil crudeness • crudites · · · Info · Definitions · Synonyms · Characters · · crude oil · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) a dark oil consisting mainly of hydrocarbons. Synonyms: petroleum, crude oil, crude, rock oil, fossil oil, oil. · · Noun Definition 1 Synonyms · · · petroleum · · Synonym 1 crude · · Synonym 2 rock oil · · Synonym 3 fossil oil · · Synonym 4 oil · · Synonym 5 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 u latin small letter u U+0075