sentences:  Another productive word-formation process is nominal compounding, producing compound words such as "babysitter" or "ice cream" or "homesick".A process more common in Old English than in Modern English, but still productive in Modern English, is the use of derivational suffixes ("-hood", "-ness", "-ing", "-ility") to derive new words from existing words (especially those of Germanic origin) or stems (especially for words of Latin or Greek origin).Formation of new words, called neologisms, based on Greek and/or Latin roots (for example "television" or "optometry") is a highly productive process in English and in most modern European languages, so much so that it is often difficult to determine in which language a neologism originated.