The Hebrew Vocabulary Guide, a free online resource hosted by LanguageGuide.org, can help you bulk up on your comprehension and recognition for Hebrew vocabulary words. This website has hundreds of images, with each picture accompanied by the written Hebrew word and a mouse-over audio feature that pronounces the word for you in Hebrew.
Because the Hebrew alphabet is very different from the English alphabet (and, keep in mind, is read from right to left rather than left to right), it is very helpful to hear the Hebrew words pronounced and see pictures of them: these aids help you truly learn the vocabulary words and remember them, whereas you may have an extremely difficult time trying to learn Hebrew vocabulary if all you had was a side-by-side list of Hebrew and English terms.
The Hebrew Vocabulary Guide is divided into forty-eight sections, each of which is listed on the main webpage by its category title: you can click on the various category labels to open new pages that contain the images, words and audio files for that particular category.
The domains of vocabulary you can learn on the Hebrew Vocabulary Guide are as follows (they're also roughly divided into larger groupings--quite well organized):
Preliminaries: Alphabet, Greetings, Numbers
People and Clothing: the Body, Men's Clothing, Women's Clothing, Family
Foods: Fruits, Vegetables
Animals: Farm Animals, Pets, Sea Animals, Insects, Birds, Reptiles and Amphibians, Sea Animals
Observing the world around you: Colors, Space, Plants, Weather, the Sea
Things at Home: the Den, the Dining Room, the Kitchen, the House, the Bedroom, the Utility Room
Work, Technology and Life: Jobs, the Farm, the City, Money, Computers, Electronics, Baby, Kids, Land Travel, Food, Medicine, Fantasy, Tools, Construction and Miscellaneous.
Because the Hebrew Vocabulary Guide is organized like this, it makes it an ideal resource for either systematically memorizing domains of vocabulary or utilizing for quick access to a particular word you've been wanting to learn.