The Oxford Thesaurus An A-Z Dictionary of Synonyms - anxiety n.

1) solicitude, concern, uneasiness, disquiet, nervousness, worry, dread, angst, apprehension, foreboding: Philip began to feel genuine anxiety over Tanya's safety. 2) appetite, hunger, thirst, desire, eagerness, longing, ache, concern: It is every person's anxiety to obtain for himself the inestimable pearl of genuine knowledge.