spasmodic

As an adjective spasmodic

is of or relating to a spasm; resembling a sudden contraction of the muscles.

As a noun larypgismus is

(medicine) a spasmodic state of the glottis, giving rise to contraction or closure of the opening.

As an adjective spasmodic

is of or relating to a spasm; resembling a sudden contraction of the muscles.

As a noun vellication is

(chiefly|medicine|obsolete) a spasmodic twitching.

Spasmatic is a synonym of spasmodic.

As adjectives the difference between spasmodic and spasmatic

is that spasmodic is of or relating to a spasm; resembling a sudden contraction of the muscles while spasmatic is having, or having to do with, a spasm or spasms.