Feminine nouns ending in -a, and masculine ending in -us have their palatal forms: -ia, -ius (the latter is declined in the first paradigm in its plural). The nominative singular ending -ias (sg. nom.; the first paradigm) alone is a palatal variant of -as, but -ias pattern, differently from -ia, -ius, are not palatalized counterpart for -as (unpalatalized equivalent in sg. nominative) and there is no palatalized counterpart for -as type. The -ias pattern is a type of -ys pattern, its words are declined like -ys words, except sg. nom. -ias and, for some of the words, vocative -iau. There are only a few words of -ias type.