Suffix vs Suffixless - What's the difference?

As a noun suffix

is one or more letters or sounds added at the end of a word to modify the word's meaning.

is to append (something) to the end of something else.

without a suffix.

(wikipedia suffix)

(es)

One or more letters or sounds added at the end of a word to modify the word's meaning.

The suffix "-able" changes "sing" into "singable".

(mathematics) A subscript.

* The plural suffices occasionally appears (including in one educational publication), but it is not a standard Latin plural.

* (affixes)

* inflectional suffix * derivational suffix * suffixal * suffixation

(es)

to append (something) to the end of something else

(-)

Without a suffix.

* nonsuffixed, unsuffixed