Space noun – An extent or area available for or used up by some activity or thing. Sky and space are semantically related. In some cases you can use "Sky" instead a noun "Space". Nearby Words: spacing, spacious, spaced, spaceship, spacer
Sky noun – The expanse of air surrounding the earth. Space and sky are semantically related. Sometimes you can use "Space" instead a noun "Sky". Nearby Words: skyline, skyway, skying, skye, skyer