sigmatism

As nouns the difference between astigmatism and sigmatism

is that astigmatism is a defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred while sigmatism is a lisp.

As nouns the difference between stigmatism and sigmatism

is that stigmatism is image-formation property of an optical system which focuses a single point source in object space into a single point in image space while sigmatism is a lisp.

As nouns the difference between sibilant and sigmatism

is that sibilant is (phonetics) a hissing sound such as the 's' or 'sh' in 'sash' or 'surge' while sigmatism is a lisp.

As an adjective sibilant

is characterized by a hissing sound such as the "s" or "sh" in sash'' or ''surge .

As nouns the difference between lisp and sigmatism

is that lisp is the habit or an act of lisping while sigmatism is a lisp.

As a verb lisp

is to pronounce the sibilant letter ‘s’ imperfectly; to give ‘s’ and ‘z’ the sounds of ‘th’ ({{IPA|/θ /ð/|lang=en}}) — a defect common amongst children.

As a proper noun Lisp

is a functional programming language with a distinctive parenthesized syntax, much used in artificial intelligence.