orinasal vs speech sound

orinasal and speech sound both are nouns.

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

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

orinasal: a speech sound produced with both the oral and nasal passages open (as French nasal vowels)
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 orinasal include phone, sound.

orinasal (noun)	speech sound (noun)
a speech sound produced with both the oral and nasal passages open (as French nasal vowels)	(phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language