lisp vs articulate

lisp is a noun but articulate is not a noun.

Word	Noun	Adjective	Verb	Adverb
lisp	Yes	No	Yes	No
articulate	No	Yes	Yes	No

As verbs, articulate is a hypernym of lisp; that is, articulate is a word with a broader meaning than lisp:

Other hypernyms of lisp include enounce, enunciate, pronounce, say, sound out.

lisp (noun)	articulate (noun)
a speech defect that involves pronouncing `s' like voiceless `th' and `z' like voiced `th'

lisp (adjective)	articulate (adjective)
	expressing yourself easily or characterized by clear expressive language
	consisting of segments held together by joints

lisp (verb)	articulate (verb)
speak with a lisp	speak, pronounce, or utter in a certain way
	express or state clearly
	put into words or an expression
	provide with a joint
	unite by forming a joint or joints