dog-ear vs signal

dog-ear and signal both are nouns.

Word	Noun	Adjective	Verb	Adverb
dog-ear	Yes	No	No	No
signal	Yes	Yes	Yes	No

As nouns, signal is a hypernym of dog-ear; that is, signal is a word with a broader meaning than dog-ear:

Other hypernyms of dog-ear include sign, signaling, signalling.

dog-ear (noun)	signal (noun)
a corner of a page turned down to mark your place	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

dog-ear (adjective)	signal (adjective)
	notably out of the ordinary

dog-ear (verb)	signal (verb)
	communicate silently and non-verbally by signals or signs
	be a signal for or a symptom of