mandatory (n.)
mandatory (adj.)
- absolute
- authoritative
- binding
- canonical
- commanding
- compelling
- compulsory
- conclusive
- decisive
- dictated
- didactic
- essential
- exigent
- final
- forced
- formulary
- hard-and-fast
- imperative
- imperious
- importunate
- imposed
- indispensable
- inevitable
- instructive
- involuntary
- irrevocable
- must
- necessary
- necessitous
- needed
- needful
- obligatory
- official
- peremptory
- prescribed
- prescriptive
- regulation
- required
- requisite
- standard
- statutory
- ultimate
- urgent
