As is well known, the classification of common nouns already has been established well in the history of Spanish grammar. Therefore, most scholars have used it as the basis for their analysis without much consideration. But, such classification has posed a problem that has not been fundamentally resolved, namely the presence of overlap between the sub-categories of common nouns and the re-categorization between lower types due to the conversion of categories. Furthermore, each scholar uses different classification names or systems, causing confusion in the in-depth analysis of common nouns with consistent criteria. In this paper, I tried to overcome the limitations of traditional common noun analysis by introducing the features [+continuos/ -continuos]. The parts that were difficult to solve with a traditional feature analysis can be more clearly analyzed by these features. I analyzed deeply the continuity of nouns, and, based on this concept, explained systematically the similarities between the plural form of material nouns and the plural form of countable nouns. And I also resolved clearly the interpretational confusion between symmetrical nouns and asymmetric nouns. I argued logically that the plural morphemes [-s/ -es] of material nouns can be explained semantically by the concept of continuity, and is not related with the existing countability of nouns.