I'm not AWS certified, but I've been a technologist for many years and I majored in CS, so it all just sort of makes sense. Some names such as ELB, RDS and Lambda are intuitive. But some are overloaded, for example Alexa. They have Alexa for business and Alexa Top Sites (domain name research). BTW, has anyone else used Alexa Top Sites in AWS, it seems way overpriced to me.
I'd be leery of someone who knew all these names, but didn't have much actual experience as a technologist, but in an interview, they'd probably sound better than I would.