obligations (part of speech: noun)
requirements (part of speech: noun)
- This is in the nature of things; however, the nature of things has provided for their necessities. - "The Works of the Right Honourable Edmund Burke, Vol. V. (of 12)", Edmund Burke.
- The necessities of a colony in its youth, and the peculiar cast of mind which they serve to induce, are certainly not favourable to the development of poetic genius. - "Leading Articles on Various Subjects", Hugh Miller.
- " We've thrown out all we owned except bare necessities," he explained, patiently. - "The Killer", Stewart Edward White.