Nouns

(n)crack, cracking, snapa sudden sharp noise“the crack of a whip”, “he heard the cracking of the ice”, “he can hear the snap of a twig”
(n)fracture, crack, crackingthe act of cracking something
(n)crackingthe process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)

Adjectives

(s)bang-up, bully, corking, cracking, dandy, great, groovy, keen, neat, nifty, not bad, peachy, slap-up, swell, smashing, oldexcellent“he did a bully job”, “a neat sports car”, “had a great time at the party”, “you look simply smashing”, “we had a grand old time”