inflectional ending vs inflectional suffix

inflectional ending and inflectional suffix both are nouns.

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

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

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

inflectional ending (noun)	inflectional suffix (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