Using Lexipedia you can visually map out words and concepts in a clean and friendly interface. No more thumbing through a dictionary, or fumbling through a single-word search; with Lexipedia you can see related words, synonyms, antonyms and fuzzynyms. And best of all, it's absolutely free!
n.
the period of instruction in a school; the time period when school is in session; "stay after school"; "he didn't miss a single day of school"; "when the school day was done we would walk home together"
v.
change the use of and make available or usable; "develop land"; "The country developed its natural resources"; "The remote areas of the country were gradually built up"