declamation vs ranting

declamation and ranting both are nouns.

Word	Noun	Adjective	Verb	Adverb
declamation	Yes	No	No	No
ranting	Yes	No	No	No

As nouns, ranting is a hyponym of declamation; that is, ranting is a word with a more specific, narrower meaning than declamation:

Other hyponyms of declamation include broadside, philippic, tirade, harangue, rant, raving.

declamation (noun)	ranting (noun)
vehement oratory	a loud bombastic declamation expressed with strong emotion
recitation of a speech from memory with studied gestures and intonation as an exercise in elocution or rhetoric