Based on the clue 'add two letters to this term for a small house in ...', what is the answer?

Based on the clue 'add this one letter to ology to get the zoology b...', what is the answer? Based on the clue 'add this vegetable to corned beef hash it becomes...', what is the answer? Based on the clue 'add this word to electro to get the adjective for ...', what is the answer? Based on the clue 'add two letters to the end of sled and you get thi...', what is the answer? Based on the clue 'add up one of each us coin in general circulation ...', what is the answer? Based on the clue 'add yboy to this 3 letter symbol to get the full n...', what is the answer? Based on the clue 'addams family adjective in song 5', what is the answer? Based on the clue 'added thrust for takeoffs is provided by these ext...', what is the answer?