Concordant (adjective)

1. In agreement; consistent with each other.
2. In harmony or tune; melodious.
3. Having the same direction or trend as something else.

Origin:

Late middle english: from latin concordant- "agreeing, harmonious", from the verb concordare, from concors "of one mind".

Examples:

1. The results of the two tests were concordant and showed that the patient was free of the disease.
2. The choir sang in concordant harmony, creating a beautiful sound.
3. The trend in the stock market was concordant with the overall economy.
4. The witnesses' statements were concordant with each other, strengthening the prosecution's case.
5. The music was so concordant that it seemed like one instrument was playing, not a whole orchestra.