There is more than one: determinant, determination, determiner, determinism. Also the adjective determinable may be used as a noun.
The suffix that can be added to "determine" to make it a noun is "-ation," resulting in the noun "determination."
To turn "exclaim" into a noun, you can add the suffix "-ation" to make it "exclamation."
The suffix "er" can be added to offend to make it a noun, resulting in "offender."
The suffix "-ity" can be added to make prosper a noun, resulting in "prosperity."
You can make "flexible" into a noun by adding the suffix "-ity" to create "flexibility."
To make "alter" a noun, you can add the suffix "-ation" to create the noun "alteration."
To turn "exclaim" into a noun, you can add the suffix "-ation" to make it "exclamation."
The suffix "er" can be added to offend to make it a noun, resulting in "offender."
The suffix "-ity" can be added to make prosper a noun, resulting in "prosperity."
You can make "flexible" into a noun by adding the suffix "-ity" to create "flexibility."
To make "alter" a noun, you can add the suffix "-ation" to create the noun "alteration."
The medical suffix -tomy makes a noun (an operation) from a noun (an organ).
The correct suffix to make "leader" an abstract noun is "-ship", resulting in the word "leadership".
-ability can be added to conceive to make conceivability, which is a noun. Conceivableness is also a noun.
-ability can be added to conceive to make conceivability, which is a noun. Conceivableness is also a noun.
To add a suffix to "tend" to make it a noun, you can use "-ency" to form "tendency."
You can turn "persist" into a noun by adding the suffix "-ence" to it, creating the noun "persistence." This noun refers to the quality of continuing to do something despite obstacles or opposition.
You can add the suffix "-ize" to "critic" to create the noun "criticize."