Oleiferous is a word that means producing, containing, or yielding oil. There are many synonyms for this word, each with its own connotations and nuances. Some possible synonyms for oleiferous include oily, lubricant, unctuous, fat-containing, and greasy. Other related words might include adipose, rich, potent, and fragrant. Depending on the context, these words could be used to describe anything from cooking ingredients to industrial machinery to natural resources. Ultimately, the choice of synonym depends on the writer or speaker's intended meaning and the effect they hope to achieve with their words.