Образуйте существительные от следующих глаголов: refer, increase, define, move, experience, exchange, lose, confide, describe, control, attempt, tend, develop, classify, associate, employ, accumulate

Refer -reference
 increase - increase
 define - definition
move - movement
experience - experience
exchange - exchange
 lose - loss confide - confidence
describe - description
control - control, controller
attempt - attempt
tend - tender develop - development
 classify – class, classification
associate - association
employ – employer, employee, (un)employment  
accumulate – accumulation, accumulator