stutter vs speech disorder

stutter and speech disorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
stutter	Yes	No	Yes	No
speech disorder	Yes	No	No	No

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

stutter: a speech disorder involving hesitations and involuntary repetitions of certain sounds
speech disorder: a disorder of oral speech

Other hypernyms of stutter include defect of speech, speech defect.

stutter (noun)	speech disorder (noun)
a speech disorder involving hesitations and involuntary repetitions of certain sounds	a disorder of oral speech

stutter (verb)	speech disorder (verb)
speak haltingly