Philanthropy
Philanthropy could be actions displaying a love for man, based on Greek root words.
Peter was not just a man of words but also a man of action, displaying both initiative and courage, as well as a strong attachment for his Lord Jesus.
Emphatic means that something is done or said in a boisterous way. It also means emphasis was placed on the action or words.
Elucidate
X-ray is an action word that means to photograph or examine with X-rays.
The word 'respond' means that the person who said it wants a verbal action from you. In other words a yes or no answer or an explanation.
Credo
Odometer
Deeds and not words means that you must not only promise to do something for someone, but do it by fulfilling the action.
Rheumatoid arthritis
Epidermis is the word that most likely means an outer layer of skin.
One word is omnipotent.