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hard-and-fast vs invariable

invariable vs hard-and-fast

hard-and-fast is not a noun while invariable is a noun.

hard-and-fast and invariable both are adjectives.

Word NounAdjectiveVerbAdverb
hard-and-fast No Yes No No
invariable Yes Yes No No
hard-and-fast (noun) invariable (noun)
a quantity that does not vary
hard-and-fast (adjective) invariable (adjective)
(of rules) stringently enforced not liable to or capable of change
Difference between hard-and-fast and invariable

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