There are some words that have similar sounds, though they seem to not share any particular root, and have general connotation. For example, gl-, in gleam, glitter, glisten, has something to do with shiny things. That's the only one I can think of, but I saw an article with one or two other similar "root"s.
Is there a name for words/sounds/roots like these?
Is there a good resource for a list of them? Could be fun to learn them all and use them for poetic effect.