collecting

kəˈlɛkt

verb

bring or gather together (a number of things).

he went round the office collecting old coffee cups

gather,accumulate,assemble,amass,stockpile,pile up,heap up,rack up,run up,scrape together,store (up),hoard,save,cumulate,lay in/up,garner,mass,increase,multiply,accrue,snowball,tot up,stash (away)