Latin Declension Charts Made Simple (With Practice)

Latin declensions are the system Latin uses to show a noun's role in a sentence. English uses word order — "the dog bit the man" means something very different from "the man bit the dog." Latin uses endings instead. Change the ending of a noun and you change its job in the sentence. There are five declension groups, and once you learn the patterns, Latin grammar starts making sense.

Grammarians sort the five declensions by the last letter of the noun's stem and by the ending of the genitive singular (Allen and Greenough, New Latin Grammar §37). The chart below compares those two markers. For the full ending tables for every case, see our Latin declension endings chart.

First Declension (-a Stems)

First declension nouns are mostly feminine and their stems end in -a. The classic example is puella (girl). The nominative singular ends in -a, the genitive singular in -ae, and the nominative plural in -ae. If your student is in the Grammar Stage, these are the first endings they will memorize. The sing-song chant — a, ae, ae, am, ā — is the standard way to learn them. (The final ā is long, marked with a macron.)

Second Declension (-o Stems)

Second declension nouns have stems ending in -o, but that -o is rarely visible in the dictionary form. The model word is servus (slave or servant), whose stem is servo-. Most masculine nouns end in -us in the nominative singular, a few end in -er (puer, ager), and neuter nouns end in -um (bellum). So -us is a nominative ending, not a separate kind of stem. The genitive singular is -ī for all of them (servī, bellī), and the masculine nominative plural is -ī as well. Neuter nouns have identical nominative and accusative forms (bellum in the singular, bella in the plural) — a rule that applies across all Latin neuter nouns.

Third Declension (Consonant and -i Stems)

Third declension is the largest and most varied group. It includes masculine, feminine, and neuter nouns with stems ending in consonants or -i. The model is rex (king), with genitive regis. The key to third declension is learning the genitive form first, because the nominative can look quite different from the stem. This is where many students get tripped up, but the endings themselves are consistent once you identify the stem.

Fourth Declension (-u Stems)

Fourth declension nouns have stems ending in -u, and those in -us are mostly masculine (a few, such as manus and domus, are feminine). The model is exercitus (army). Its nominative singular ends in a short -us, just like second-declension servus, which can confuse students. The genitive singular is exercitūs, with a long -ūs. Without macrons the two forms look identical, so check the dictionary entry: a noun listed as exercitus, exercitūs (genitive -ūs) is fourth declension, while servus, servī (genitive -ī) is second.

Fifth Declension (-e Stems)

Fifth declension is the smallest group. These nouns are mostly feminine with stems ending in -e. The classic example is res (thing), with genitive rei. You will not encounter many fifth declension nouns in early Latin study, but res and dies (day) appear frequently enough that they are worth knowing.

How to Actually Learn the Endings

Reading about declensions is one thing. Memorizing them is another. Here is what works well:

• Chant them. Grammar Stage students already do this. Saying the endings aloud in a steady rhythm gives students a fixed sequence they can recall and check themselves against.
• Practice with real words. Decline actual nouns, not just abstract endings. When your student can decline terra, dominus, and rex from memory, the patterns stick.
• Use a cheat sheet until you do not need one. Print our declension cheat sheets and keep them next to your Latin textbook. Glancing at a chart while working through exercises is not cheating — it is how you internalize patterns.
• Do interactive practice. Classical Quest's grammar practice mode drills declension endings with instant feedback so your student knows immediately whether they got it right.

The Pattern Behind the Patterns

Once your student has first and second declension down, point out that the same six cases appear in every declension: nominative, genitive, dative, accusative, ablative, and vocative. The cases never change — only the endings do. That realization turns five separate charts into one system with five variations, and that is far less intimidating. Pair declension mastery with verb conjugation practice for a complete foundation in Latin grammar.