Adjunctive and Second class

Adjunctive adjective - Joining; forming an adjunct.

Second class and adjunctive are semantically related. In some cases you can use "Second class" instead an adjective "Adjunctive".

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

Adjunctive and second class are semantically related. Sometimes you can use "Adjunctive" instead an adjective phrase "Second class".