plangency vs sonorousness

plangency and sonorousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
plangency	Yes	No	No	No
sonorousness	Yes	No	No	No

As nouns, plangency and sonorousness are synonyms defined as:

plangency and sonorousness: having the character of a loud deep sound; the quality of being resonant

Other synonyms of plangency include resonance, reverberance, ringing, sonority, vibrancy.

plangency (noun)	sonorousness (noun)
having the character of a loud deep sound; the quality of being resonant	having the character of a loud deep sound; the quality of being resonant