Nouns

(n)thousand, one thousand, 1000, M, K, chiliad, G, grand, thou, yardthe cardinal number that is the product of 10 and 100
(n)grand piano, granda piano with the strings on a horizontal harp-shaped frame; usually supported by three legs

Adjectives

(s)expansive, grand, heroicof behavior that is impressive and ambitious in scale or scope“an expansive lifestyle”, “in the grand manner”, “collecting on a grand scale”, “heroic undertakings”
(s)august, grand, lordlyof or befitting a lord“heir to a lordly fortune”, “of august lineage”
(s)deluxe, gilded, grand, luxurious, opulent, princely, sumptuous, lushostentatiously rich and superior in quality“a princely sum”, “gilded dining rooms”, “these architecture magazines are full of the lush interiors of the rich and famous”
(s)fantastic, grand, howling, marvelous, marvellous, rattling, terrific, tremendous, wonderful, wondrous, phenomenalextraordinarily good or great; used especially as intensifiers“a fantastic trip to the Orient”, “the film was fantastic!”, “a howling success”, “a marvelous collection of rare books”, “had a rattling conversation about politics”, “a tremendous achievement”
(s)exalted, elevated, sublime, grand, high-flown, high-minded, lofty, rarefied, rarified, idealistic, noble-mindedof high moral or intellectual value; elevated in nature or style“an exalted ideal”, “argue in terms of high-flown ideals” (Oliver Franks), “a noble and lofty concept”, “a grand purpose”
(s)grandlarge and impressive in physical size or extent“the bridge is a grand structure”
(s)grandthe most important and magnificent in adornment“grand ballroom”, “grand staircase”
(s)distinguished, grand, imposing, magisterialused of a person's appearance or behavior; befitting an eminent person“his distinguished bearing”, “the monarch's imposing presence”, “she reigned in magisterial beauty”