The term HOUSE MATE can be solved by the crossword solution SENATE, which is a 6 letter word. The SENATE is one of the two chambers of the United States Congress, the other being the HOUSE of Representatives. Each state is represented in the SENATE by two senators, regardless of population. Senators serve six-year terms and are elected by their respective state legislatures. The SENATE is responsible for passing laws and confirming presidential appointments. A HOUSE MATE is someone who lives in the same HOUSE as you, usually sharing common living spaces.