Feedback
call out
Expose or accuse someone of wrongdoing or incompetence
call for
Demand
Go to collect something
Telephone for something
Go and collect someone to take them out
Require
call in
Get someone to come and do a job
Stop and visit
call up
Summon someone for military service
Telephone
call on
Ask for help
Visit
Challenge
Ask someone to do something, especially to speak in public. (Formal)
call round
Visit
call forth
Make something happen
call off
Cancel
Order someone to stop attacking
call after
Name someone after somebody else
call around
Visit
call back
Return a phonecall