1. [n]  the feat of mustering strength for a renewed effort; "he singled to start a rally in the 9th inning"; "he feared the rallying of their troops for a counterattack"
2. [n]  the act of mobilizing for a common purpose; "the bell was a signal for the rallying of the whole neighborhood"
3. [adj]  rousing or recalling to unity and renewed effort; "a rallying cry"

RALLYING is a 8 letter word that starts with R.