Synonyms of the word

prerequisite

• adj. Required as a prior condition of something else; necessary or indispensable.
• n. Something that must be gained in order to gain something else.
• n. In education, a course or topic that must be completed before another course or topic can be started.…

duty

• n. That which one is morally or legally obligated to do.
• n. A period of time spent at work or doing a particular task.
• n. Describing a workload as to its idle, working and de-energized periods.
• n. A tax placed on imports or exports; a tariff, customs duty, excise duty.
• n. (obsolete) One's due, something one is owed; a debt or fee.
• n. (obsolete) Respect; reverence; regard; act of respect; homage.
• n. The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain…

obligation

• n. The act of binding oneself by a social, legal, or moral tie to someone.
• n. A social, legal, or moral requirement, duty, contract, or promise that compels someone to follow or avoid…
• n. A course of action imposed by society, law, or conscience by which someone is bound or restricted.
• n. (law) A legal agreement stipulating a specified payment or action; the document containing such agreement.

obligatory

• adj. Imposing obligation, morally or legally; binding.
• adj. Requiring a matter or obligation.

requirement

• n. A necessity or prerequisite; something required or obligatory. Its adpositions are generally of in relation…
• n. Something asked.
• n. (engineering) A statement (in domain specific terms) which specifies a verifiable constraint on an implementation…

responsibility

• n. The state of being responsible, accountable, or answerable.
• n. A duty, obligation or liability for which someone is held accountable.
• n. (military) The obligation to carry forward an assigned task to a successful conclusion. With responsibility…
• n. (military) The obligation for the proper custody, care, and safekeeping of property or funds entrusted…