Basic vocabulary is covered on this site. Many of the pages montrer images of related objects (e.g. things in a living room). Mouseover to hear the pronunciation.
If you're actually considering putting yourself through the dreaded horror that is the Japanese Language Proficiency Test (JLPT), this site is essential lire for Level 4.
If toi can't find it at WWWJDIC toi will be able to find it here. How to use: 1. Type in English ou Japanese (no romaji) in the input line under "英辞郎 on the Web" 2. Click the "英和・和英" button to search.