colloquium vs speech

colloquium and speech both are nouns.

Word	Noun	Adjective	Verb	Adverb
colloquium	Yes	No	No	No
speech	Yes	No	No	No

As nouns, speech is a hypernym of colloquium; that is, speech is a word with a broader meaning than colloquium:

Other hypernyms of colloquium include address.

colloquium (noun)	speech (noun)
an address to an academic meeting or seminar	the mental faculty or power of vocal communication
an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting	(language) communication by word of mouth
	the act of delivering a formal spoken communication to an audience
	words making up the dialogue of a play
	a lengthy rebuke
	the exchange of spoken words
	your characteristic style or manner of expressing yourself orally
	something spoken