The Jedic languages lost the construct form, collective number, gender, and case. Therefore, nouns and adjectives in these languages only have number (singular, plural, and dual) and are divided into eight types.

The first type, which is followed by the old nouns in e and i. The ancient equative case of Jedus produces comparative and/or modal adjectives and adverbs. The former follow this paradigm. These make the singular and plural in -ø and the dual in -er. For example, eguþ ("animal"), eguþ pl., eguþer dl; titretet ("childlike"), titretet, titreteter.

The second type, which is followed by the old nouns in pʰ, bʰ and old collective. These make the singular in -g, the plural in -bug and the dual in -gur. For example, eguþeg ("herd"), eguþebug pl., eguþegur dl.

The third type, which is followed by the old nouns in u and eu̯. These make the singular in -g, the plural in -et and the dual in -ir. For example, dusg ("rice plant"), duset pl., dusir dl.

The fourth type, which is followed by the old nouns in tʃ, t, d, tʰ, kʰ, r, s, ł,  p and n. These make the singular in -tu (but it is -o in verbs ending in r and s), the plural in -þu and the dual in -tur. For example, etetu ("house"), eteþu pl., etetur dl.; dusdro ("mud"), dusdþu pl., dusdtur dl.

The fifth type, which is followed by the old nouns in ae and ai̯. These make the singular and plural in -a (but it is -o in verbs ending in ai̯) and the dual in -ar. For example, ra ("tooth"), ra pl., rar dl.; dro ("ant"), dra pl., drar dl.

The sixth type, which is followed by the old nouns in a and au̯. These make the singular and plural in -u and the dual in -or. For example, bregu ("sea"), bregu pl., bregor dl.

The seventh type, which is followed by the old nouns in o. These make the singular in -u, the plural in -y and the dual in -gur. For example, eru ("bird"), ery pl., ergur dl.

The eighth type, followed by the old nouns in ou̯. These form the singular in -e, the plural in -u, and the dual in -ag. For example, serieue ("hake"), serieuu pl., serieuag dl.