This morphophonemic study aims to analyze pluralization processes for common nouns in English and native Turkish. To achieve this, a contrastive analysis focusing on English and Turkish plural markers from a structuralist point of view is taken. The results of the analysis reveal the differences and similarities between two languages in terms of plural markers. As for the differences, it is found that English and Turkish differ in regular and irregular plural forms as well as active role of consonants and vowels for pluralization process. Similarities for plural markers include focusing on the final sound of nouns, relying on distinctive features of sounds, employing allomorphs and using plural markers as suffixes for both languages to a varying degree. The findings of this study might help learners of English and Turkish by revealing the differences and similarities in both languages.