Answer:

firsts

Answer	Crossword Clue
FIRSTS	Golds
FIRSTS	"Guinness" listings
FIRSTS	Initial ones

FIRSTS	Debuts
FIRSTS	Premieres
FIRSTS	Breakthroughs
FIRSTS	Notable events
FIRSTS	Noteworthy events
FIRSTS	Groundbreakers
FIRSTS	Baby book entries
FIRSTS	Earliest occurrences

FIRSTS	Armstrong on the moon and Hillary atop Mount Everest
FIRSTS	The Wrights' flight, and others
FIRSTS	Top-quality merchandise
FIRSTS	New accomplishments
FIRSTS	Historic events
FIRSTS	Ones for the record book
FIRSTS	Some words in baby books?
FIRSTS	They haven't been done before

FIRSTS	Never-happened-before events
FIRSTS	Some Guinness Book listings
FIRSTS	Newsworthy events
FIRSTS	The best quality of certain articles of commerce.
FIRSTS	Best quality of merchandise.
FIRSTS	Best grades of merchandise.
FIRSTS	Unique events.
FIRSTS	Premieres.

FIRSTS	Blue ribbons
FIRSTS	Bannister and Lindbergh feats, e.g.
FIRSTS	Sports triumphs
FIRSTS	Best quality of merchandise
FIRSTS	Guinness Book entries
FIRSTS	Originals
FIRSTS	Track wins
FIRSTS	Many Guinness listings

FIRSTS	Ones for the record books
FIRSTS	Some records
FIRSTS	Novel things
FIRSTS	Novel events
FIRSTS	Precedent setters