| blue(sky, noun, colour, heaven, vault) |
| blue sky |
| firmament(noun, blue, heaven, sky, vault) |
| sky(noun, blue, heaven, atmosphere, vault) |
| aeon(age, future, infinity, perpetuity, forever) |
| afterlife(age, future, infinity, perpetuity, forever) |
| age(future, infinity, perpetuity, forever) |
| ages(age, future, infinity, perpetuity, forever) |
| blue air |
| blue moon(expression, age, future, infinity, perpetuity) |
| celestial sphere(expression, blue, heaven, heavens, Elysium) |
| empyrean(blue, heaven, sky, vault, heavens) |
| endless time(expression, age, future, infinity, perpetuity) |
| endlessness(age, future, infinity, perpetuity, forever) |
| everlastingness(age, future, infinity, perpetuity, forever) |
| forever(age, future, infinity, perpetuity) |
| forever and a day(expression, idiom, age, future, infinity) |
| future(age, infinity, perpetuity, forever) |
| immortality(age, future, infinity, perpetuity, forever) |
| imperishability(age, future, infinity, perpetuity, forever) |