Nonessential part

Antonyms for "nonessential part" (20 found)

Adjective(3 words)
core componentcore ideaprimary component
Noun(16 words)
building blockcore featurecornerstonecritical ecosystem componentessentialessential partintegralmandatory componentmost pivotalnecessarynecessary partobligatopart of the curriculumrequiredvitalvital part
Verb(1 words)
be an element of

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