Die-hard and Oldline

Die-hard adjective - Tending to favor established ideas, conditions, or institutions.

Oldline and die-hard are semantically related In some cases you can replace term "Oldline" with "Die-hard", this terms are similar.

Oldline adjective - Adhering to conservative or reactionary principles.

Die-hard and oldline are semantically related in reactionary topic. You can use "Die-hard" instead an adjective "Oldline", if it concerns topics such as conservative, accepted, conservative politically.