speaker vs squawk box

speaker and squawk box both are nouns.

Word	Noun	Adjective	Verb	Adverb
speaker	Yes	No	No	No
squawk box	Yes	No	No	No

As nouns, squawk box is a hyponym of speaker; that is, squawk box is a word with a more specific, narrower meaning than speaker:

speaker: electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
squawk box: the loudspeaker on an intercom or public address system

speaker (noun)	squawk box (noun)
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance	the loudspeaker on an intercom or public address system
someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)