The adjective innumerable denotes a number that is beyond count or, more loosely, that is extremely difficult to count: the innumerable stars in the sky. A strong synonym for innumerable is myriad, which describes things of an indefinitely great number (such as stars of a summer night) or things that have innumerable phases, aspects, or variations (the myriad mind of Shakespeare, for instance). Fittingly, myriad takes myriad forms. That is, myriad functions as a noun as well as an adjective. You can say “a myriad of reasons” (noun), or “myriad reasons” (adjective). Both are correct, though the adjective form is more common.

Things that are described as grand make a big impression, whether for their impressive size or appearance (grand mountain scenery) or, moving from things to people, their majestic or dignified air (her manner is grand and regal). A synonym of grand, stately comes imbued with nobility and elegance, and so takes the grandness up a notch. Stately is defined as “majestic” or “imposing in magnificence or elegance,” as in the case of a stately home, or an abode that looks like it could belong to royalty. It’s also used less commonly to describe people that exude refinement, elegance, and decorum—sometimes to the point of seeming haughty, aloof, or overly formal.

A city is a large or important town, or, more specifically and in the United States, an incorporated municipality, usually governed by a mayor. The synonym metropolis is used of large, bustling cities, or of cities that are of particular importance, as seats of government or cultural centers. The word itself comes from Late Latin mētropolis, the see or center of authority of a metropolitan bishop, from Greek mētrópolis “a mother state or city,” as of an ancient Greek colony. If you are looking for the perfect word for an an even larger city, or an urban region that consists of several large cities and suburbs that adjoin each other, the even more fun-to-say synonym megalopolis may do the trick.