diningroom \diningroom\, dining room \dining room\n. a room used for dining. In a residence, it usually contains a dining table and some furniture, such as a buffet or sideboard, for storing tableware and dining utensils. [WordNet 1.5]

Source: The Collaborative International Dictionary of English v.0.48
 

53 Moby Thesaurus words for "dining room": automat, beanery, bistro, buffet, buvette, cafe, cafeteria, canteen, cantina, chophouse, chuck wagon, coffee shop, coffeehouse, coffeeroom, commons, cookhouse, cookshack, cookshop, diner, dinette, dining car, dining hall, dining saloon, dog wagon, drive-in, drive-in restaurant, eatery, eating house, fast-food chain, grill, grillroom, hamburger stand, hash house, hashery, hot-dog stand, kitchen, lunch counter, lunch wagon, luncheonette, lunchroom, mess, mess hall, messroom, pizzeria, quick-lunch counter, refectory, restaurant, salle a manger, smorgasbord, snack bar, tavern, tearoom, trattoria

Source: Moby Thesaurus II by Grady Ward, 1.0
 

dining room

Source: WordNet (r) 2.0