Synonyms for Cracking (same or very similar meaning)
WordNet sense 1 (a sudden sharp noise):
crack, snapWordNet sense 2 (very good):
bully, dandy, great, groovy, keen, neat, nifty, peachy, smashing, swell, corking, slap-up, bang-up, not badWordNet sense 3 (having desirable or positive qualities especially those suitable for a thing specified):
goodWordNet sense 4 (the act of cracking something):
fractureFrom the ODE community, based on WordNetadd/edit