Submitted by Anonymous (not verified) on Thu, 10/26/2017 - 17:01 Lemma: roofNgram Count: 1Wordnet ID: 112625Starts with letter: YesIndefinite Article: aGoogle Ngram Count: 532757Sense count: 3Contained in other ngrams: 43Hierarchy: AdjectivePast ParticipleForms: roofingroofsForms Count: 2