There is no adjective form for the noun guild.
If you want to describe a noun as belonging to or relating to a guild, use the possessive form for the noun, the guild's charter; or use the noun as an adjective, basically forming a compound noun, the guild charter.
Examples of adjectives that are formed from a noun are:air (noun) - airy (adjective)artist (noun) - artistic (adjective)beauty (noun) - beautiful (adjective)blood (noun) - bloody (adjective)fish (noun) - fishy (adjective)hope (noun) - hopeful (adjective)length (noun) - lengthy (adjective)memory (noun) - memorable (adjective)politics (noun) - political (adjective)thought (noun) - thoughtful (adjective)use (noun) - useful (adjective)water (noun) - watery (adjective)
The noun slipper does not have an adjective: you would use the noun as a noun adjunct.*The word slippers (slip-on shoes) is not directly related to the adjective slippery.
The abstract noun form of the adjective 'useful' is usefulness.The word 'useful' is the adjective form of the abstract noun use.
Extensive is an adjective, and use is a noun.
You can use it with a noun to modify it or to add to it.
the adjective is captive - the noun is captivity
An adjective describes a noun.
The abstract noun form of the adjective 'useful' is usefulness.The word 'useful' is the adjective form of the abstract noun use.
The word histories is a noun, the plural form of the singular noun history.If you want the adjective, you would use historical.
'Friendly' is an adjective because you'd use it to describe someone. Any word that can be used to describe someone (a noun) is an adjective.
The word 'genius' is a noun, but some dictionaries do list the noun 'genius' as an informal adjective; for example:That was a genius move by the challenger.However, a noun functioning as an adjective is a specific part of speech called an attributive noun (or noun adjunct). There is no consistency among dictionaries for the many nouns that we use as adjectives; some list their use as an adjective and others do not.
it's a noun. Can't think of a use as adjective.