bode vs signal

bode is not a noun while signal is a noun.

Word	Noun	Adjective	Verb	Adverb
bode	No	No	Yes	No
signal	Yes	Yes	Yes	No

As verbs, signal is a hypernym of bode; that is, signal is a word with a broader meaning than bode:

Other hypernyms of bode include bespeak, betoken, indicate, point.

bode (noun)	signal (noun)
	any nonverbal action or gesture that encodes a message
	any incitement to action
	an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes

bode (adjective)	signal (adjective)
	notably out of the ordinary

bode (verb)	signal (verb)
indicate, as with a sign or an omen	communicate silently and non-verbally by signals or signs
	be a signal for or a symptom of