For words you should use the dictionary that comes with it, which I'm pretty sure is Kôjien. Kanjigen is way more complete than Nelson's as far as I'm aware: you get all sorts of information on the classification of the character (jôyô or not; number of strokes; radical; Kuten, Unicode, Shift JIS, and JIS codes), readings (including which Chinese dynasty they were borrowed from, original Chinese tone, and current Mandarin reading, and name readings), meanings, character breakdown and etymology, related characters, and difficult readings. That's pretty comprehensive.
Also, look at the compounds given in Kanjigen for 電: 電影, 電撃, 電激, 電光, 電光石火, 電光朝露, 電閃, 電掃, 電鞭, 電滅, 電掣, 電纜. I can't begin to describe how much of a PITA it was for me to input all of those, as most of them don't exist in the ことえり dictionary. The compounds in 漢和辞典 tend to be more for obscure words used in old Chinese texts than everyday words (certainly on this list, anyway), probably because Japanese people already know the everyday words and they have dictionaries for those anyway.