In some situations jealous and envious may carry the same meaning, but not always. For example: A jealous husband is not the same as an envious husband.modgirl said:The words jealous and envy used to be quite different. Now, they're essentially synonyms.
Some dictionaries show as many as 5 different definitions for jealous. Only one of these coincides with envious. For example: http://dictionary.reference.com/search?q=jealous