Noun : a pile of papers; a pile of bricks. ,a pile of work. ,the noble pile of Windsor Castle. ,They made a pile on Wall Street.    From Dictionary.com. 

Verb (used with object) : to pile up the fallen autumn leaves. ,to pile up money; squirrels piling up nuts against the winter. ,He piled the wagon with hay.    From Dictionary.com. 

Verb (used without object) : to pile off a train. ,The snow is piling up on the roofs.    From Dictionary.com.