Open English Wordnet
Nouns
(n)bomber, grinder, hero, hero sandwich, hoagie, hoagy, Cuban sandwich, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zepa large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
Verbs
(v)substitute, sub, stand in, fill inbe a substitute“The young teacher had to substitute for the sick colleague”, “The skim milk substitutes for cream — we are on a strict diet”