coexist- to live together without any problems; to be together in the same time or space

 

cohesive- sticking together

 

coincidence- a sequence or events happening together that although accidental seems to have been planner or arranged

 

combine- to put two things together

 

commiserate- to feel sorry for someone, something, or a situation; to feel pity; to get together with someone to  feel sadness

 

committee- a group of people who meet together to discuss a topic

 

communication- the act of talking with someone and discussing something together

 

community- a place where people live together

 

compare- to put things together to see how they are the same

 

compatible- able to live together and get along; things that can go together without problems