OXFORD DICTIONARY
Jealous, adj.
1 (often foll. by of) fiercely protective (of rights etc.).
2 afraid, suspicious, or resentful of rivalry in love or affection.
3 (often foll. by of) envious or resentful (of a person or a person's advantages etc.).
4 (of God) intolerant of disloyalty.
5 (of inquiry, supervision, etc.) vigilant.
jealously adv.
ME f. OF gelos f. med.L zelosus ZEALOUS
THESAURUS
Jealous
anxious, begrudging, bitter, covetous, demanding, desirous of, distrustful, doubting, envious, enviousness, envying, grasping, green, green with envy, green with jealousy, green-eyed, grudging, horn-mad, insecure, invidious, invidiousness, jaundice-eyed, jaundiced, jealousy, mistrustful, mistrusting, possessive, possessory, questioning, resentful, suspicious, threatened, vulnerable, yellow, yellow-eyed
ROGET THESAURUS
Jealous
Jealousy
N
jealousy, jealousness, jaundiced eye, envious suspicion, suspicion, green-eyed monster, yellows, Juno, jealous, jealous as a barbary pigeon, jaundiced, yellow-eyed, envious, hornmad.