Hard-core and Hard-boiled

Hard-core adjective - Firmly established over time.

Hard-boiled and hard-core are semantically related. In some cases you can use "Hard-boiled" instead an adjective phrase "Hard-core".

Hard-boiled adjective - Having or showing a lack of sympathy or tender feelings.

Hard-core and hard-boiled are semantically related. Sometimes you can use "Hard-core" instead an adjective phrase "Hard-boiled".