Wikidiffcom vs Firmament - What's the difference?

As a noun firmament is

firmament (sky).

Wikidiffcom has no English definition. It may be misspelled.

(en noun)

(uncountable) The vault of the heavens; the sky.

And God said, "Let there be a firmament in the midst of the waters, and let it separate the waters from the waters."

(obsolete) basis.

The field or sphere of an interest or activity.

the international fashion firmament

(archaic) In the geocentric Ptolemaic system, the eighth sphere, which carried the fixed stars.

* firmamental

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