cause

1 cause /ˈkɑːz/ noun
plural causes
1 cause
/ˈkɑːz/
noun
plural causes
Britannica Dictionary definition of CAUSE
1 
[count] : something or someone that produces an effect, result, or condition : something or someone that makes something happen or exist
— often + of
2 
: a reason for doing or feeling something
[noncount]
— often + for
[singular]
— see also probable cause
3 
[count] : something (such as an organization, belief, idea, or goal) that a group or people support or fight for

lost cause

: a person or thing that is certain to fail

make/find common cause

formal
: to join together with someone in order to achieve a shared goal
2 cause /ˈkɑːz/ verb
causes; caused; causing
2 cause
/ˈkɑːz/
verb
causes; caused; causing
Britannica Dictionary definition of CAUSE
[+ object]
1 
: to make (something) happen or exist : to be the cause of (something)
2 
: to make (someone) feel, have, or do something
— often followed by to + verb