Impure and Second class

Impure adjective - Containing foreign or lower-grade substances.

Second class and impure are semantically related In some cases you can replace phrase "Second class" with "Impure", this terms are similar.

Nearby Words: impurity, impurely

Second class noun - Not the highest quality in a classification.

Impure and second class are semantically related in low topic. Sometimes you can use "Impure" instead an adjective phrase "Second class".