Informative and reliable brand name that plays on the word "knowledge".
KnowledgeA has 10 characters and three syllables. Three syllable names are used by established brands like Toshiba, Adobe and Santander.
Knowledgea.com is a .com domain. Dot com domains are the most valuable top-level-domain in the world, used by famous websites like facebook.com. A .com is the first thing people think of when they think of a website.