Chief and First-string

Chief adjective - Coming before all others in importance.

First-string and chief are semantically related In some cases you can use "First-string" instead an adjective "Chief".

Nearby Word: chiefly

First-string adjective - Of the very best kind.

Chief and first-string are semantically related in highest in importance topic. Sometimes you can use "Chief" instead an adjective phrase "First-string".