lambdacism vs speech disorder

lambdacism and speech disorder both are nouns.

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

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

lambdacism: speech defect involving excessive use or unusual pronunciation of the phoneme `l'
speech disorder: a disorder of oral speech

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

lambdacism (noun)	speech disorder (noun)
speech defect involving excessive use or unusual pronunciation of the phoneme `l'	a disorder of oral speech