WordNet sense 1 (a person who announces the changes of steps during a dance):

caller-out

WordNet sense 2 (the person initiating a telephone call):

telephoner, caller-up, phoner

WordNet sense 3 (a social or business visitor):

company

WordNet sense 4 (neither warm nor very cold; giving relief from heat):

cool

WordNet sense 5 (recently made, produced, or harvested):

fresh