tonic accent vs pitch accent

tonic accent and pitch accent both are nouns.

Word	Noun	Adjective	Verb	Adverb
tonic accent	Yes	No	No	No
pitch accent	Yes	No	No	No

As nouns, tonic accent and pitch accent are synonyms defined as:

tonic accent and pitch accent: emphasis that results from pitch rather than loudness

tonic accent (noun)	pitch accent (noun)
emphasis that results from pitch rather than loudness	emphasis that results from pitch rather than loudness