Coefficient and Second-string

Coefficient noun - A constant number that serves as a measure of some property or characteristic.

Second-string and coefficient are semantically related. In some cases you can use "Second-string" instead an adjective "Coefficient".

Second-string adjective - Being a replacement or substitute for a regular member of a team.

Coefficient and second-string are semantically related. Sometimes you can use "Coefficient" instead an adjective phrase "Second-string".