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 action or reaction of something (as a machine or substance) under specified circumstances; "the behavior of small particles can be studied in experiments"
n.
a mode of action; "if you persist in that course you will surely fail"; "once a nation is embarked on a course of action it becomes extremely difficult for any retraction to take place"
n.
a distinctive but intangible quality surrounding a person or thing; "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidate's headquarters"; "the place had an aura of romance"
n.
the complex of all the attributes--behavioral, temperamental, emotional and mental--that characterize a unique individual; "their different reactions reflected their very different personalities"; "it is his nature to help others"