οἰκονομίας [3 verses](noun sg fem gen) "Stewardship" is oikonomia, which means "management of a household","husbandry", "thrift", "regulation", "transaction", "contract", and  "operation". -- "Stewardship" is a Greek noun that means "management of a household","husbandry", "thrift", "regulation", "transaction", "contract", and  "operation". This is the female form of the noun "steward", referring to the discipline rather than the person. 

οἰκονομεῖν. [1 verse](verb pres inf act) "Be...a steward" is oikonomoe, which means "manage as a house-steward", "order", and "regulate".  -- "Be...a steward" is the Greek verb that means to "manage as a house-steward", "order", and "regulate". It is the verb form of the word translated as "steward" and "stewardship".  This is the only time Jesus uses this word. 

οἰκονόμος, [5 verse](noun sg masc nom) "Steware is oikonomos, which means "one who manages a household", "house-steward", generally, "manager," "administrator." -- "Steward" means "one who manages a household", "house-steward", generally, "manager," "administrator."

οἶκος [29 verses](noun sg masc nom) "House" is oikos, which means "house," "dwelling place," "room," "home," "meeting hall," "household goods," "substance," and "ruling family." It is any dwelling place but not exclusively a separate house. -- The Greek word translated as "house," is any dwelling place but not exclusively a separate house. It means the household or clan that lives in the building as well. The English word "house" captures the idea of a "ruling family" so that works well for this word. The female form of the word has more the feel of "home."

οἰκουμένῃ [2 verses](noun sg fem dat) "The world" is oikoumene, which means "the inhabited region." It was often used to denote the civilized world as separate from the lands of barbarians. However, its literal meaning is "homeland."