Most nouns form their plural by adding s or—if they end in ch, j, s, sh, x, or z—by adding es. Most English speakers will not need help with such plural forms as thumbs, churches, fixes, or boys, and these are not listed in standard dictionary entries, including those in Webster’s Collegiate. (All inflected forms are listed in Webster’s Third New International, and Webster’s and other dictionaries published online generally accommodate the correct plural forms in their search engines.) Most dictionaries do, however, give plural forms for words ending in y that change to ies (baby etc.); for words ending in o (ratio, potato, etc.); for certain words of Latin or Greek origin such as crocus, datum, or alumna; and for all words with irregular plurals (child, leaf, etc.).