Synonyms and Antonyms for obligatory

Synonyms:

• necessary

Antonyms:

• unnecessary
• inessential

Synonyms:

• mandatory
• indispensable
• required
• imposed
• prerequisite
• incumbent on
• necessary
• compulsory
• bounden
• de rigueur

Antonyms:

• optional
• unnecessary
• indispensableness
• indispensability
• dispensable