ingressive vs speech sound

ingressive and speech sound both are nouns.

Word	Noun	Adjective	Verb	Adverb
ingressive	Yes	No	No	No
speech sound	Yes	No	No	No

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

ingressive: a speech sound by which the airstream flows inward through the mouth or nose.
speech sound: (phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language

Other hypernyms of ingressive include phone, sound.

ingressive (noun)	speech sound (noun)
a speech sound by which the airstream flows inward through the mouth or nose.	(phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language