Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
necessary | Yes | Yes | No | No |
obligatory | No | Yes | No | No |
necessary (noun) | obligatory (noun) |
---|---|
anything indispensable |
necessary (adjective) | obligatory (adjective) |
---|---|
absolutely essential | morally or legally constraining or binding |
unavoidably determined by prior circumstances | required by obligation or compulsion or convention |