屋 （オク） house, building, roof

屋外 （オクガイ） outdoors, outside

草屋 （ソウオク） thatched hut

塔屋 （トウヤ） rooftop structure, e.g. tower, elevator machine room, etc.

屋 （や） shop, store, restaurant, someone who sells (something) or works as (something), someone with a (certain) personality trait, house, roof

屋敷 （やしき） residence, estate, grounds, premises, mansion

居酒屋 （いざかや） izakaya, tavern, bar, etc. that also serves various dishes and snacks

総会屋 （そうかいや） extortionist that threatens to disrupt stock-holder meetings, sokaiya