pitch accent vs tonic accent

pitch accent and tonic accent both are nouns.

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

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

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

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