| occasion(noun, right, want, essential, requirement) |
| prime(adjective, important, significant, original, essential) |
| specification |
| term |
| unavoidable(adjective, significant, essential, basic, vital) |
| wanted(adjective, important, significant, capital, essential) |
| A-OK(flawless, faultless, textbook) |
| ABCs(noun, condition, essence, basic, necessity) |
| absolute(flawless, faultless, textbook) |
| acceptable(good, fit, appropriate, sufficient, enough) |
| accomplished(flawless, faultless, textbook) |
| advisable(good, fit, appropriate, acceptable, apposite) |
| applicable(good, correct, fit, appropriate, fair) |
| apposite(good, fit, appropriate, acceptable) |
| apt(good, correct, fit, appropriate, fair) |
| axiological(adjective, important, significant, original, essential) |
| axiomatic(important, significant, original, basic, vital) |
| bare necessities |
| basal(adjective, important, significant, original, essential) |
| becoming(good, fit, appropriate, suitable, acceptable) |