Open English Wordnet
Nouns
(n)tranquilizer, tranquillizer, tranquilliser, antianxiety agent, ataractic drug, ataractic agent, ataractica drug used to reduce stress or tension without reducing mental clarity
Adjectives
(s)ataractic, ataraxic, sedative, tranquilizing, tranquillizing, tranquilising, tranquillisingtending to soothe or tranquilize“valium has a tranquilizing effect”, “took a hot drink with sedative properties before going to bed”