inflectional suffix vs inflectional ending

inflectional suffix and inflectional ending both are nouns.

Word	Noun	Adjective	Verb	Adverb
inflectional suffix	Yes	No	No	No
inflectional ending	Yes	No	No	No

As nouns, inflectional suffix and inflectional ending are synonyms defined as:

inflectional suffix and inflectional ending: an inflection that is added at the end of a root word

inflectional suffix (noun)	inflectional ending (noun)
an inflection that is added at the end of a root word	an inflection that is added at the end of a root word