| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | important |
| Synonyms: | acute, clamant, clamorous, compelling, critical, crucial, crying, dire, essential, exigent, imperative, importunate, instant, pressing, significant, urgent, vital |
| Antonyms: | unimportant |
| Main Entry: | cardinal |
| Part of Speech: | adjective |
| Definition: | important, key |
| Synonyms: | basal, basic, central, chief, constitutive, essential, first, foremost, fundamental, greatest, highest, indispensable, leading, main, overriding, overruling, paramount, pivotal, preeminent, primary, prime, principal, ruling, vital |
| Antonyms: | inessential, insignificant, minor, negligible, secondary, unimportant |
| Main Entry: | chief |
| Part of Speech: | adjective |
| Definition: | most important, essential |
| Synonyms: | arch, capital, cardinal, central, champion, consequential, controlling, crucial, effective, especial, first, foremost, grand, head, highest, key, leading, main, major, momentous, number one, outstanding, paramount, potent, predominant, preeminent, premier, primal, primary, prime, principal, ruling, significant, star, stellar, superior, supreme, telling, uppermost, vital, weighty |
| Antonyms: | inessential, minor, secondary, subordinate, unimportant, unnecessary |
| Main Entry: | constitutional |
| Part of Speech: | adjective |
| Definition: | inherent |
| Synonyms: | built-in, congenital, deep-seated, essential, inborn, inbred, ingrained, innate, intrinsic, natural, organic, vital |
| Antonyms: | contracted, learned |
| Main Entry: | critical |
| Part of Speech: | adjective |
| Definition: | urgently important |
| Synonyms: | acute, all-important, climacteric, conclusive, consequential, crucial, dangerous, deciding, decisive, desperate, determinative, dire, exceptive, grave, hairy*, hazardous, high-priority, integral, momentous, perilous, pivotal, precarious, pressing, risky, serious, significant, strategic, urgent, vital, weighty |
| Antonyms: | trivial, uncritical, unimportant |
| Main Entry: | crucial |
| Part of Speech: | adjective |
| Definition: | critical, important |
| Synonyms: | acute, central, clamorous, climacteric, climatic, compelling, deciding, decisive, desperate, dire, essential, hanging by thread, high-priority, imperative, insistent, momentous, necessary, on thin ice, pivotal, pressing, searching, showdown, touch and go, touchy, urgent, vital |
| Notes: | the words crucial, essential, and vital cannot be qualified (cannot be more or less...) |
| Antonyms: | inessential, trivial, uncritical, unimportant |
| Main Entry: | effervescent |
| Part of Speech: | adjective |
| Definition: | enthusiastic, vivacious |
| Synonyms: | animated, bouncy, brash, bubbly, buoyant, ebullient, excited, exhilarated, exuberant, gleeful, happy, high-spirited, hilarious, in high spirits, irrepressible, jolly, joyous, lively, merry, mirthful, sprightly, vital, zingy |
| Antonyms: | dull, inactive, serious, sober, unenthusiastic |
| Main Entry: | energetic |
| Part of Speech: | adjective |
| Definition: | full of life; forceful |
| Synonyms: | active, aggressive, animated, ball of fire, breezy, brisk, demoniac, driving, dynamic, enterprising, forcible, fresh, hardy, high-powered, indefatigable, industrious, kinetic, lively, lusty, peppy, potent, powerful, red-blooded, rugged, snappy, spirited, sprightly, spry, stalwart, strenuous, strong, sturdy, tireless, tough, unflagging, untiring, vigorous, vital, vivacious, zippy |
| Antonyms: | idle, inactive, lazy, lethargic, lifeless, slow, sluggish, tired |
| Main Entry: | fresh |
| Part of Speech: | adjective |
| Definition: | energetic, healthy |
| Synonyms: | active, alert, blooming, bouncing, bright, bright-eyed, bushy-tailed, chipper, clear, dewy, fair, florid, glowing, good, hardy, invigorated, keen, like new, lively, refreshed, rehabilitated, relaxed, relieved, rested, restored, revived, rosy, ruddy, sprightly, spry, stimulated, undimmed, unfaded, unused, unwearied, unwithered, verdant, vigorous, vital, wholesome, young |
| Antonyms: | exhausted, lifeless, tired, unenergetic, worn |