Difference between Dumb and Inarticulate

DUMB vs INARTICULATE: ADJECTIVE

Not willing to speak; mute; silent; not speaking; not accompanied by words.
Lacking brightness or clearness, as a color.
See Deaf-mute.
A form of intermittent fever which has no well-defined “chill.”
Any animal except man; -- usually restricted to a domestic quadruped; -- so called in contradistinction to man, who is a “speaking animal.”
A west Indian plant of the Arum family (Dieffenbachia seguina), which, when chewed, causes the tongue to swell, and destroys temporarily the power of speech.
Unintentional; haphazard.
Conspicuously unintelligent; stupid.
Not self-propelling.
Not expressed or articulated in sounds or words.
Unwilling to speak; taciturn.
Temporarily speechless, as with shock or fear.
Incapable of using speech; mute. Used of humans.
Lacking the power of speech. Used of animals and inanimate objects.
Slow to learn or understand; lacking intellectual acuity
Unable to speak temporarily
Lacking the power of human speech
A cake made in silence by girls on St. Mark's eve, with certain mystic ceremonies, to discover their future husbands.
See under crambo.
Temporarily incapable of speaking
Pointless, foolish, lacking intellectual content or value.
Extremely stupid.
Unable to speak; lacking power of speech.
To confound; to astonish; to render silent by astonishment; or, it may be, to deprive of the power of speech.
Signs and gestures without words; as, to tell a story in dumb show.
Unable to speak because of hereditary deafness

Not having joints or other articulations
Unable to speak with any clarity
Speechless
Not articulated in normal words
Incapable of expressing one's ideas or feelings clearly.
Incapable of articulating.
Without a hinge; -- said of an order (Inarticulata or Ecardines) of brachiopods.
Not jointed or articulated; having no distinct body segments.
Not uttered with articulation or intelligible distinctness, as speech or words.
Not having joints or segments.
Going unexpressed.
Unable to speak with clarity or eloquence.
Uttered without the use of normal words or syllables; incomprehensible as speech or language.
Without or deprived of the use of speech or words
Unable to speak; speechless.

Lacking intellectual acuity
Destitute of the power of speech; unable to utter articulate sounds: as, a deaf and dumb person; the dumb brutes.
Mute; silent; refraining from speech.
To make dumb; silence; overpower the sound of.
To become dumb; be silent.
Mute; not accompanied with or emitting speech or sound: as, a dumb show; dumb signs.
Hence Lacking some usual power, manifestation, characteristic, or accompaniment; destitute of reality in some respect; irregular; simulative: as, dumb ague; dumb craft. See phrases below.
Slow to learn or understand
Dull; stupid; doltish.
Deficient in clearness or brightness, as a color.
Synonyms and Mute, etc. See silent.

In anatomy and zoology, not articulated; having no articulation or joint; specifically, of or pertaining to the Inarticulata; lyopomatous; ecardinal.
Not articulate; not uttered or emitted with expressive or intelligible modulations, as sounds or speech; not distinct or with distinction of syllables.
Not articulating or speaking; incapable of expressing thought in speech.

Foolish, Idiotic, Dumbass, Silly, Unarticulate, Dense, Silent, Speechless, Dim, Slow, Dull, Mute, Inarticulate, Obtuse, Stupid

Aphonic, Groaning, Silent, Moaning, Wordless, Grunting, Unspoken, Speechless, Stuttering, Mute, Aphasic, Unarticulated, Dumb, Stammering, Incoherent

Foolish, Idiotic, Dumbass, Silly, Unarticulate, Dense, Silent, Speechless, Dim, Slow, Dull, Mute, Inarticulate, Obtuse, Stupid

Tongue tied, Aphonic, Groaning, Silent, Moaning, Wordless, Grunting, Unspoken, Speechless, Stuttering, Mute, Aphasic, Unarticulated, Dumb, Incoherent

You see a lot of smart guys with dumb women, but you hardly ever see a smart woman with a dumb guy.
So yes, this is being dumb for the sake of being dumb, but it had a lot of funny moments.
Dumb Luck: Occasionally, a halfling will be struck by a bout of absolutely dumb luck.
The characters are dumb guys, dumb girls, and a hell of a lot of bitchiness.
For all of the hundreds of dumb things that have ruined my photos, sometimes equally dumb luck comes and gives you a great shot.
Europeans whose dumb cry for peace I hear, for my ears are attended to hearing the dumb millions?
Oh, I once knew a poor person who was dumb, so all poor people must be dumb.
Well this is the dumb dumb that just wants to be noticed.
This dumb blonde aka Bengali babe is the living definition of dumb!
Dumb name, dumb dog, but teeth down to here.