declamation vs tirade

declamation and tirade both are nouns.

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

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

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

declamation (noun)	tirade (noun)
vehement oratory	a speech of violent denunciation
recitation of a speech from memory with studied gestures and intonation as an exercise in elocution or rhetoric