Suffixes for Nouns:
* -ed: Conceited (adjective meaning excessively proud or vain)
* -ful: Conceitful (adjective meaning characterized by conceit)
Suffixes for Verbs:
* -ing: Conceiting (verb, but rarely used)
* -er: Conceiter (noun, but rarely used)
Other Suffixes:
* -ous: Conceitous (adjective, not a standard word)
* -ism: Conceitism (noun, not a standard word)
Note: While some of these suffixes are grammatically possible, they are not commonly used in English. The most common way to use "conceit" is as a noun, or to add the suffix "-ed" to create the adjective "conceited."