The verification that a method of measurement actually measures what it is expected to measure is known as

Validity is the verification that a method actually measures what it is expected to measure.

Reliability concerns the consistency of results, not whether the right thing is measured.

Consistency is one facet of reliability, again about stability across trials.

Objectivity is freedom from bias, a separate quality from measuring the intended trait.

A test can be reliable yet not valid if it consistently measures the wrong thing.

Validity is thus the more fundamental requirement of sound measurement.