organization (a group of people with a purpose) / system (a group of people) / (biology) tissue (a group of similar cells that function together to do a specific job)

software / video game

gallium arsenide

material for making something such as food, web page, art, / material for writing a document

Sofia (the capital city of Bulgaria)

chili sauce, hot sauce

organizer

(chemistry) chemical element

(~州) Arkansas (a state of the United States) / (~川) Arkansas (river)

negotiation while chatting at a banquet or dinner function, dinner table diplomacy