1. Engage
2. Contribute
3. Collaborate
4. Join
5. Take part
6. Play a role
7. Interact
8. Involve
9. Participate in
10. Have a hand in
11. Take an active part
12. Join in
13. Be a part of
14. Lend a hand
15. Cooperate
16. Be involved
17. Take part in
18. Join forces
19. Take an interest
20. Have a stake
21. Be engaged
22. Join up
23. Have a say
24. Be a player
25. Be a member
26. Be concerned
27. Join together
28. Work together
29. Be instrumental
30. Chip in

When it comes to finding the best ideas for participating in activities, there are a variety of synonyms that can be used to express the same concept. Words such as engage, contribute, collaborate, join, take part, play a role, interact, involve, participate in, have a hand in, take an active part, join in, be a part of, lend a hand, cooperate, be involved, take part in, join forces, take an interest, have a stake, be engaged, join up, have a say, be a player, be a member, be concerned, join together, work together, be instrumental, and chip in can all be used to describe the idea of participating in an activity. Using a variety of synonyms can help to make conversations more interesting and can help to add clarity to what is being discussed.