Synonyms of the word

rigorous

• adj. Showing, causing, or favoring rigour; scrupulously accurate or strict; thorough.
• adj. Severe; intense.

demanding

• adj. Requiring much endurance, strength, or patience.
• v. present participle of demand.

exact

• adj. Precisely agreeing with a standard, a fact, or the truth; perfectly conforming; neither exceeding nor…
• adj. Habitually careful to agree with a standard, a rule, or a promise; accurate; methodical; punctual.
• adj. Precisely or definitely conceived or stated; strict.
• adj. (algebra, of a sequence of groups connected by homomorphisms) Such that the kernel of one homomorphism…
• v. (transitive) To demand and enforce the payment or performance of.
• v. (transitive) To make desirable or necessary.
• v. (transitive) To forcibly obtain or produce.
• adv. exactly.

strict

• adj. Strained; drawn close; tight.
• adj. Tense; not relaxed.
• adj. Exact; accurate; precise; rigorously nice.
• adj. Governed or governing by exact rules; observing exact rules; severe; rigorous.
• adj. Rigidly interpreted; exactly limited; confined; restricted.
• adj. (botany) Upright, or straight and narrow; — said of the shape of the plants or their flower clusters.
• adj. Severe in discipline.

stringent

• adj. Strict; binding strongly; making strict requirements; restrictive; rigid; severe.

tight

• adj. Firmly held together; compact; not loose or open.
• adj. (of a space, design or arrangement) Narrow, such that it is difficult for something or someone to pass…
• adj. Well-rehearsed and accurate in execution.
• adj. (slang) Intoxicated; drunk or acting like being drunk.
• adj. (slang) Extraordinarily great or special.
• adj. (slang, British (regional)) Mean; unfair; unkind.
• adj. (obsolete) Not ragged; whole; neat; tidy.
• adj. (obsolete) Handy; adroit; brisk.
• adj. (poker) Of a player, who plays very few hands.
• adj. (poker) Using a strategy which involves playing very few hands.
• adv. Firmly, so as not to come loose easily.
• adv. Soundly.
• v. (obsolete) To tighten.