both (people); the two of them
together (of two people); both (of you, them, etc.)
two by two; by twos; as a couple; in pairs
double room; room shared by two people; shared room
two people riding together (on a bike, etc.); riding double
two by two; by twos; as a couple; in pairs
two people sharing one role
two is a company, three is a crowd; one companion is better than two
two people working together on one thing; doing something with two people; bout in which one wrestler faces two challengers in succession