Old-line and Trigger-happy

Old-line adjective - Tending to favor established ideas, conditions, or institutions.

Trigger-happy and old-line are semantically related. In some cases you can use "Trigger-happy" instead an adjective phrase "Old-line".

Trigger-happy adjective - Irresponsible in the use of firearms.

Old-line and trigger-happy are semantically related. Sometimes you can use "Old-line" instead an adjective phrase "Trigger-happy".