rigorous

Main Entry:
rigorous [rig-er-uhs]
Part of Speech: adjective
Definition: severe; exact
Synonyms: accurate, ascetic, austere, bitter, brutal, burdensome, correct, definite, dogmatic, exacting, hard, harsh, inclement, inflexible, intemperate, ironhanded, meticulous, nice, onerous, oppressive, precise, proper, punctilious, right, rigid, rugged, scrupulous, stern, stiff, strict, stringent, uncompromising, unpermissive
Notes: rigorous means demanding strict attention to rules and procedures; vigorous means strong and active physically or mentally
Antonyms: easy, easy-going, lax, lenient, loose, mild
Main Entry: arduous
Part of Speech: adjective
Definition: difficult, hard to endure
Synonyms: backbreaking, burdensome, exhausting, fatiguing, formidable, grueling, harsh, heavy, labored, laborious, murder, no picnic, onerous, painful, punishing, rigorous, rough, severe, strenuous, taxing, tiring, toilsome, tough, troublesome, trying, uphill
Antonyms: easy, facile, motivating
Main Entry: austere
Part of Speech: adjective
Definition: severe in manner
Synonyms: ascetic, astringent, cold, earnest, exacting, forbidding, formal, grave, grim, hard, harsh, inexorable, inflexible, obdurate, rigid, rigorous, serious, sober, solemn, somber, stern, stiff, strict, stringent, unfeeling, unrelenting
Antonyms: bland, calm, gentle, meek, mild
Main Entry: bitter
Part of Speech: adjective
Definition: painful, distressing
Synonyms: afflictive, annoying, bad, brutal, calamitous, cruel, dire, disagreeable, displeasing, distasteful, disturbing, galling, grievous, hard, harsh, heartbreaking, hurtful, inclement, intemperate, intense, merciless, offensive, poignant, provoking, rigorous, rugged, ruthless, savage, severe, sharp, stinging, unpalatable, unpleasant, vexatious, woeful
Antonyms: good, helping, wonderful
Main Entry: careful
Part of Speech: adjective
Definition: cautious; painstaking
Synonyms: accurate, alert, apprehensive, assiduous, attentive, chary, choosy, circumspect, concerned, conscientious, conservative, cool, deliberate, discreet, exacting, fastidious, finicky, fussy, going to great lengths, guarded, heedful, judicious, leery, meticulous, mindful, observant, particular, playing safe, precise, prim, protective, provident, prudent, punctilious, regardful, religious, rigorous, scrupulous, selfdisciplined, shy, sober, solicitous, solid, thorough, thoughtful, vigilant, wary
Antonyms: careless, inattentive, incautious, thoughtless, uncareful, unconcerned, unscrupulous
Main Entry: correct
Part of Speech: adjective
Definition: accurate, exact
Synonyms: according to Hoyle, actual, amen, appropriate, cooking with gas, dead on, equitable, factual, faithful, faultless, flawless, for sure, free of error, impeccable, just, legitimate, nice, okay, on target, on the ball, on the beam, on the button, on the money, on the nose, on track, perfect, precise, proper, regular, right, right as rain, right on, right stuff, righteous, rigorous, stone, strict, true, undistorted, unmistaken, veracious, veridical
Antonyms: flawed, imprecise, inaccurate, incorrect, inexact, wrong
Main Entry: exact
Part of Speech: adjective
Definition: accurate, precise
Synonyms: bull's-eye, careful, clear, clear-cut, correct, dead on, definite, distinct, downright, explicit, express, faithful, faultless, identical, literal, methodical, nailed down, nice, on target, on the button, on the money, on the numbers, orderly, particular, perfect, right, right on, rigorous, sharp, specific, true, unequivocal, unerring, veracious, verbal, verbatim
Antonyms: approximate, imprecise, inaccurate, incorrect, indefinite, inexact
Main Entry: exact
Part of Speech: adjective
Definition: careful, painstaking
Synonyms: conscientious, conscionable, demanding, exacting, finicky, fussy, heedful, meticulous, punctilious, punctual, rigorous, scrupulous, severe, strict
Antonyms: approximate, careless, uncareful, unreliable
Main Entry: exacting
Part of Speech: adjective
Definition: demanding
Synonyms: burdensome, by the book, careful, critical, difficult, exigent, finicky, fussy, grievous, hard, harsh, hypercritical, imperious, nit-picking, onerous, oppressive, painstaking, particular, persnickety, picky, precise, rigid, rigorous, severe, stern, strict, stringent, taxing, tough, trying, unsparing, weighty
Antonyms: giving, lending
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