To put two or more things together as one

• To mix or blend to make a whole
• To have or show two qualities at once

To join with others for a shared purpose

• To come together and act as one

A large farm machine that cuts and threshes grain

• Short for combine harvester

A group acting together to control a market or interest

• A business or political alliance, sometimes a cartel

A testing event where athletes perform for recruiters

• Especially for evaluating prospects before professional drafts