Words to Describe adjuncts

How adjuncts often is described ("________ adjuncts")

• indispensable
• useful
• ornamental
• essential
• necessary
• inevitable
• nominal
• pharmacological
• obligatory
• therapeutic
• various
• restrictive
• desirable
• architectural
• temporary
• accidental
• pharmacologic
• vital
• modal
• extraneous
• important
• suitable
• excellent
• surgical
• minor
• circumstantial
• invaluable
• artificial
• pleasant
• mechanical
• anesthetic
• sentential
• conjunctive
• usual
• interesting
• free
• picturesque
• inseparable
• mere
• locative
• helpful
• decorative
• valuable
• attributive
• temporal
• familiar
• optional
• effective
• powerful
• oriented
• prepositional
• predicative
• participial
• unnecessary
• dietary
• other
• clausal
• diagnostic
• verbal
• adverbial
• external