R-            One of the three fundamentals of education

RN-            ICU staffer

ERN-            Sea eagle

RENT-            Monthly apartment fee

INERT-            Like neon, argon, or xenon

RETAIN-        Keep possession of

NASTIER-        Meaner

BANISTER-        Staircase handrail

BRAINSTEM-        Midbrain, pons, and medulla oblongata

DISBARMENT-    Sanction against an attorney for severe misconduct