speak vs carry on

speak and carry on both are verbs.

Word	Noun	Adjective	Verb	Adverb
speak	No	No	Yes	No
carry on	No	No	Yes	No

As verbs, carry on is a hyponym of speak; that is, carry on is a word with a more specific, narrower meaning than speak:

speak (verb)	carry on (verb)
express in speech	continue talking
exchange thoughts; talk with	direct the course of; manage or control
use language	misbehave badly; act in a silly or improper way
give a speech to	keep or maintain in unaltered condition; cause to remain or last
make a characteristic or natural sound