overjealous vs jealous

overjealous and jealous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
overjealous	No	Yes	No	No
jealous	No	Yes	No	No

As adjectives, overjealous and jealous are synonyms defined as:

overjealous and jealous: suspicious or unduly suspicious or fearful of being displaced by a rival

Other synonyms of overjealous include green-eyed.

overjealous (adjective)	jealous (adjective)
suspicious or unduly suspicious or fearful of being displaced by a rival	showing extreme cupidity; painfully desirous of another's advantages
	suspicious or unduly suspicious or fearful of being displaced by a rival