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There are at least a few terms used to describe specific speech impediments which are themselves difficult for a person with said speech impediment to say. For example:

  • Lisp: Frequently conceived of as causing a person to pronounce the letter "s" as "th", although other forms of the condition exist.

  • Rhotacism: Inability to pronounce the letter "r".

  • Blaesitas: Softening hard consonants and hardening soft consonants; including the pronunciation of "b" as "v" or "p".

Are there more examples like this?

Was this a deliberate choice (presumably related to alliteration), or is it merely coincidental? I'm sure doctors wouldn't have chosen these words specifically because the affected people can't pronounce them, but is there an explanation of why these terms in particular were adopted?

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  • There are people who have trouble with "L" sounds, but I don't know what the term might be. – Hot Licks Aug 2 '15 at 2:23
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    Actually, your definition of lisp is too restrictive. There are more sibilants than [s] alone. Per its Wikipedia article it’s “A lisp, also known as sigmatism, is a speech impediment in which a person cannot articulate sibilants ([s], [z], [ʒ], [ʃ], [tʃ], [dʒ]).” It other words, all of those are messed up. It isn’t right to characterize the various defects as all being ones that articulate [s] as [θ] either. – tchrist Aug 2 '15 at 3:35
  • @HotLicks - According to the answer below, inability to pronounce the letter "l" is known as "Lamdacism". Pronouncing other consonants as "l" is called "lalling". – Wad Cheber Aug 2 '15 at 21:02
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Go here:

Gammacism: g -> k, t->d
Lalling: "certain consonants" -> l
Lambdacism: l -> r,w

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