verb

shout for joy or in praise or encouragement.

she cheered from the sidelines

encourage,urge on,spur on,drive on,motivate,rally,inspire,fire,fire up,give someone a lift,keep someone going,see someone through,root for,light a fire under,inspirit

noun

a shout of encouragement, praise, or joy.

a tremendous cheer from the audience

hurrah,hurray,whoop,bravo,hoot,shout,shriek,hosanna,alleluia,acclaim,acclamation,shouting,clamour,applause,clapping,ovation,holler,laudation,huzza