Informative and reliable brand name that plays on the word "knowledge".
KnowledgeA has 10 characters and three syllables. Established brands using three syllable names include McDonald's, Heineken and Grammarly.
Knowledgea.com is a .com domain. Dot com domains are the most sought after top-level-domain in the world, used by famous websites like twitter.com. A .com is the first thing people think of when they think of a website.