Collocations for exist - verb

actually, really
Do these creatures really exist?

already, still
Few of these monkeys still exist in the wild.

previously
no longer, not any more
I didn't think people like that existed any more.

not yet
The technology did not yet exist.

currently
only, solely
companies that exist solely for the purpose of mortgage lending

primarily
independently
He argued that ideas do not exist independently of the language that expresses them.

be known to
the enormous volcanoes now known to exist on Mars

appear to, be believed to, be supposed to
They appear to exist in significant numbers.
a species with only about a thousand believed to exist in the wild

continue to
cease to

Exist is used with these nouns as the subject:
alternative, attitude, bias, bond, case, challenge, competition, condition, consensus, controversy, correlation, danger, difference, disagreement, discrepancy, discrimination, distinction, doubt, effect, evidence, explanation, facility, god, gulf, imbalance, inequality, link, need, opportunity, parallel, phenomenon, possibility, practice, problem, rationing, record, regime, relationship, similarity, situation, suspicion, system, technology, tension, tradition, trust, uncertainty, vacancy