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. For example, igaþ ("animal"), igaþ pl; tytretet ("childlike"), tytretet.

The second type, which is followed by the old nouns in pʰ, bʰ and old collective. These make the singular in -g and the plural in -bag. For example, igaþeg ("herd"), igaþebag pl.

The third type, which is followed by the old nouns in u and eu̯. These make the singular in -g and the plural in -it. For example, dasg ("rice plant"), dasit pl.

The third type, which is followed by the old nouns tʃ, t, d, tʰ, kʰ, r, s, ł,  p and n. These make the singular in -du (but it is -u in verbs ending in r and s), and the plural in -þu. For example, itedu ("house"), iteþu pl.; dasdru ("mud"), dasdþu pl.

The fifth type, which is followed by the old nouns in ae and ai̯. These make the singular and plural in -ae (but it is -o in verbs ending in rai̯). For example, rae ("tooth"), rae pl.; dro ("ant"), drae pl.

The sixth type, which is followed by the old nouns in a and au̯. These make the singular and plural in -o. For example, brigo ("sea"), brigo pl.

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

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, serievɘ ("hake"), serievə pl.