Noun/Adjective Ending Choices

Sure Bets:

(1st declension) ablative singular
-am (1st declension) accusative singular
-ārum/-ōrum (1st/2nd declension) genitive plural
-ās / -ōs (1st/2nd declension) accusative plural
*-tās nominative singular feminine 3rd declension, abstract noun suffix.
[*-os, short “o,”  archaic (original) ending of some -or nouns, e.g. honos = honor]
[* 3rd declension noun ōs (ōris, neuter) mouth]
[* 3rd declension noun os (ossis, neuter), short “o,” bone]
-em (3rd declension masculine/feminine) accusative singular
*quem accusative singular masculine pronoun
[*indeclinable numbers: septem, novem, decem]
-er (2nd / 3rd declension) nominative singular masculine [*māter, feminine]
[*-(i)ter adverb from 3rd declension adjective)
-men (3rd declension) neuter nominative / accusative singular  (e.g. nōmen, flūmen)
-ius / -īus Pronoun or “pronoun” declension adjective genitive singular (cuius, eius, huius, illīus, ūnīus, etc.)
(-)id / -ud Neuter Pronoun nominative / accusative singular (id, quid, illud, aliud, etc.)

Choices: