амброзия is an Russian word started with а. Here is the definition of амброзия in English

noun амброзия (f)
ambrosia, something that has a wonderful taste or smell; ragweed, species of weed from the daisy family (produces pollen that often causes allergic reactions)

амброзией, амброзиею, амброзии, амброзий, амброзию, амброзиям, амброзиями, амброзиях