Hard-nosed and Nefarious

Hard-nosed adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.

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

Nefarious adjective - Not conforming to a high moral standard; morally unacceptable.

Hard-nosed and nefarious are semantically related. Sometimes you can use "Hard-nosed" instead an adjective "Nefarious".