Bubble (n)
1 : a small globule typically hollow and light: as a : a small body of gas within a liquid b : a thin film of liquid inflated with air or gas c : a globule in a transparent solid d : something (as a plastic or inflatable structure) that is hemispherical or semicylindrical
2 a : something that lacks firmness, solidity, or reality b : a delusive scheme
Dream (n)
1 : a series of thoughts, images, or emotions occurring during sleep
2 : an experience of waking life having the characteristics of a dream: as a : a visionary creation of the imagination : DAYDREAM b : a state of mind marked by abstraction or release from reality : REVERIE c : an object seen in a dreamlike state : VISION