| pinch(need, essential, requirement, prerequisite, essentiality) |
| pitilessness(noun, ruthlessness, mercilessness, relentlessness) |
| precondition(need, essential, requirement, prerequisite, essentiality) |
| prerequisite(need, essential, requirement, essentiality) |
| privation(need, essential, requirement, prerequisite, essentiality) |
| remorselessness(noun, state, quality, resist, perseverance) |
| requirement(need, essential, prerequisite, essentiality) |
| requisite(need, essential, requirement, prerequisite, essentiality) |
| rigidness(noun, state, quality, resist, perseverance) |
| short shrift |
| sine qua non(expression, idiom, need, essential, requirement) |
| strictness(noun, ruthlessness, pitilessness, mercilessness, relentlessness) |
| undeniability(need, essential, requirement, prerequisite, essentiality) |
| urgency(need, essential, requirement, prerequisite, essentiality) |
| vital part(expression, need, essential, requirement, prerequisite) |
| vitals(need, essential, requirement, prerequisite, essentiality) |
| want(need, essential, requirement, prerequisite, essentiality) |
| abusiveness |
| austerity |
| basic(essential, requirement, prerequisite) |