Complex sentence: Razorback and wild hog are American colloquialisms, loosely applied to any type of feral domestic pig, wild boar or hybrid in North America; pure wild boar are sometimes called "Russian boar" or "Russian razorbacks".
Split into simpler sentences: Razorback and wild hog are American colloquialisms, loosely applied to any type of feral domestic pig, wild boar or cross in North America. Pure wild boar are sometimes called "Russian boar" or "Russian razorbacks".