Collocations for reliable - adj.

be, prove, seem
become
consider sth

extremely, fairly, very, etc.
highly
It has a highly reliable control system.

absolutely, completely, perfectly, totally, utterly
He's a good musician and totally reliable.

not entirely, not wholly
reasonably
enough, sufficiently
These measurements are reliable enough for most purposes.

statistically

as
This statement is not reliable as evidence.

Reliable is used with these nouns:
ally, barometer, contraception, data, estimate, figure, gauge, guide, index, indication, indicator, information, instrument, intelligence, means, measure, method, prediction, record, report, result, service, source, statistics, supplier, supply, testimony, transportation, weather, witness, yardstick