Here are some ideas:
AZJ.info could be A-Z Jumble, a website with tons of fun jumbles, possibly submitted by users, and could be ad-supported.
GSZ.info could stand for Get Some Zest, a website featuring entertaining content to help people get in a good mood, or where people can post such content. It could be jokes, humor, games, video clips, stories, whatever will help people get in a good mood!
GZM.info could be Get Zero Mistakes, a website with tools to help people check and correct spelling mistakes, grammar, etc.
HZD.info could be a search engine called HZD: the theme of the search engine could be an animal that looks like a cross between a Hyena, Zebra, and a Donkey, a really cool possibly photoshopped animal that makes a big smile if you find results, and a frown if you don't. The name would be short, and the theme catchy, it could be the next google.
KTQ.info could stand for Know the Quality, a possibly ad-supported website or forum where people can post what they think the quality of a product or service is so that people can be aware of the poor or amazing quality of a product, or someone offering a product or service could ask for input. It could be a big hit!