existed on (verb) feed on: consume
Sinonime: answer, appertain, be a matter of, be about, be directed to, be relevant, bear upon,
belong,
connect, correspond with,
cover, deal with,
encompass, have a bearing on, have reference, have relation, have to do with,
hold,
include,
incorporate, involve,
pertain,
point, regard,
relate,
take in,
touch