Synonyms of the word

world-class

• adj. Of a standard that ranks among the best in the world.
• adj. (Can we verify^{([fullurl:Wiktionary:Requests for verification/English?? +])} this sense?) Of the highest…

best

• adj. superlative form of good: most good.
• adj. Most; largest.
• adv. superlative form of well: most well.
• adv. To the most advantage; with the most success, cause, profit, benefit, or propriety.
• n. (uncountable) The supreme effort one can make, or has made.
• n. (uncountable) One's best behavior.
• n. (countable) The person (or persons; or thing or things) that is (are) most excellent.
• v. To surpass in skill or achievement.
• v. (transitive) To beat in a contest;.

first

• adj. Preceding all others of a series or kind; the ordinal of one; earliest.
• adj. Most eminent or exalted; most excellent; chief; highest.
• adv. Before anything else; firstly.
• n. (uncountable) The person or thing in the first position.
• n. (uncountable) The first gear of an engine.
• n. (countable) Something that has never happened before; a new occurrence.
• n. (countable, baseball) first base.
• n. (countable, Britain, colloquial) A first-class honours degree.
• n. (countable, colloquial) A first-edition copy of some publication.
• n. A fraction of an integer ending in one.
• n. (obsolete) Time; time granted; respite.

foremost

• adj. first, either in time or in space.
• adj. of a higher rank or position; paramount.
• adj. (nautical) closest to the bow.
• adv. in front.
• adv. prominently forward.