The definition of obligatory is necessary, required or expected as a result of law or social custom.
The definition of exigent is pressing, demanding or urgent.
The definition of compelling is someone or something extremely attractive or interesting.
The definition of optional is available, but not required.
Of coercion or tending to coerce
(Biochemistry) Being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet:
The definition of imperative is something that has authority or is absolutely necessary.
Required beforehand, esp. as a necessary condition for something following
(Law) Without legal obligation or consideration:
Imposed on one by authority, command, or convention
An official or authoritative command; an order or injunction; a commission; a judicial precept.
The definition of requisite is something required or necessary.
Find another word for mandatory. In this page you can discover 28 synonyms, antonyms, idiomatic expressions, and related words for mandatory, like: obligatory, forced, exigent, compulsory, impelling, compelling, optional, coercive, essential, imperative and necessary.