 The synthetic forms of the regular adjectives in -ος, -η and -o is created with the suffix -οτερος ("-oteros"), -οτερη ("-oteri") and -οτερο ("-otero").For those adjectives that end in -ης and -ες or -υς, -εια and -υ the corresponding suffixes are -εστερος ("-esteros") etc.and -υτερος ("-yteros") etc.