The word for a large impressive group is "multitude." This term conveys a sense of abundance and can refer to a vast number of people or things gathered together. Other synonyms might include "horde" or "throng," depending on the context.
formula one
another word for large group is clan.
The noun 'galaxy' is a singular, common, concrete noun; a word for an extremely large group of stars and planets; a large group of impressive people or things. The noun 'galaxy' is used as a collective noun for a galaxy of stars (heavenly luminescence or human luminaries).
The noun 'passel' is a word for a large group of people or things, a word for a thing.
The word is exodus.
The story she wrote was impressive.
assembly, aggregation
team
A very impressive performance is a "Showstopper".
The word VEBY is an anagram of BEVY (a group or assemblage, especially a relatively large group).
The book was very impressive, I recommend it.That was an impressive firework display.You need to be really impressive to catch my attention.
manchion