Submitted by Anonymous (not verified) on Thu, 10/26/2017 - 17:01 Ngram Count: 1Wordnet ID: 112618Starts with letter: YesIndefinite Article: aGoogle Ngram Count: 9517855Sense count: 8Contained in other ngrams: 441Hierarchy: NounVerbForms: roofingroofedroofsForms Count: 3