"joint activities" is correct and usable in written English.
You can use it to refer to activities that two or more people are doing together. For example: "My brother and I enjoy doing joint activities, like cycling and playing board games."
Moreover, the joint activities of TNFα and activated Ras led to cooperative induction of angiogenesis and to increased dissemination of tumor cells to lymph nodes (LN).
After several joint activities, the animosity lessened.
We are prepared now to seek solutions in all areas of our joint activities.
In 1906 Berkman was freed, and he and Goldman resumed their joint activities.
The federation offers opportunities both for staff development and for children to take part in joint activities, he adds.
One such is the successful holiday friendship project set up in Dover to provide joint activities for local children and those from asylum seeker communities.
Developed in Australia and now going global, it aims to help you set who does what chore, divide up bills and plan dinners and other joint activities.
The suspension of the joint activities would remove what for years was a working symbol of cooperation between Israelis and Palestinians under interim peace accords.
The two programs expect to hire an intergenerational coordinator who has been trained in both geriatrics and early childhood development to help develop joint activities.
From the late 1970s they organized annually to campaign for higher wages, and under a then-sluggish economy the four organizations developed joint activities.
Social network, in computers, an online community of individuals who exchange messages, share information, and, in some cases, cooperate on joint activities.
