firmament

As nouns the difference between firmament and canopy

is that firmament is firmament (sky) while canopy is a high cover providing shelter, such as a cloth supported above an object, particularly over a bed.

As a verb canopy is

to cover with or as if with a canopy.

As nouns the difference between empyrean and firmament

is that empyrean is the region of pure light and fire; the highest heaven, where the pure element of fire was supposed by the ancients to exist: the same as the ether, the ninth heaven according to ancient astronomy while firmament is firmament (sky).

As an adjective empyrean

is of the sky or the heavens; celestially refined.

As a verb azure

is .

As an adjective azure

is azure (blue in colour).

As a noun firmament is

firmament (sky).

As nouns the difference between firmament and domain

is that firmament is firmament (sky) while domain is domain (dns domain name).

As nouns the difference between foundation and firmament

is that foundation is the act of founding, fixing, establishing, or beginning to erect while firmament is firmament (sky).

As a noun firmament

is firmament (sky).

As an adjective undefined is

lacking a definition or value.

As nouns the difference between atmosphere and firmament

is that atmosphere is atmosphere while firmament is firmament (sky).

As a noun firmament

is firmament (sky).

As a proper noun cloud is

.

As nouns the difference between firmament and expanse

is that firmament is the vault of the heavens; the sky while expanse is a wide stretch, usually of sea, sky, or land.

As a verb forment

is .

As a noun firmament is

firmament (sky).