Lowly and Second class

Lowly adjective - Belonging to the class of people of low social or economic rank.

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

Nearby Word: lowliness

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

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