tone ending vs plosion

tone ending and plosion both are nouns.

Word	Noun	Adjective	Verb	Adverb
tone ending	Yes	No	No	No
plosion	Yes	No	No	No

As nouns, plosion is a hyponym of tone ending; that is, plosion is a word with a more specific, narrower meaning than tone ending:

tone ending: (music) the act or manner of terminating a musical phrase or tone
plosion: the terminal forced release of pressure built up during the occlusive phase of a stop consonant

Other hyponyms of tone ending include explosion.

tone ending (noun)	plosion (noun)
(music) the act or manner of terminating a musical phrase or tone	the terminal forced release of pressure built up during the occlusive phase of a stop consonant