rift

rift /ˈrɪft/ noun
plural rifts
rift
/ˈrɪft/
noun
plural rifts
Britannica Dictionary definition of RIFT
[count]
1 
: a situation in which two people, groups, etc., no longer have a friendly relationship
— often + between
2 
a  : a deep crack or opening in the ground, a rock, etc.
b  geology : a break in the Earth's crust