intussusception vs intussuscept

intussusception is a noun but intussuscept is not a noun.

Word	Noun	Adjective	Verb	Adverb
intussusception	Yes	No	No	No
intussuscept	No	No	Yes	No

intussusception (noun)	intussuscept (noun)
(biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall
the folding in of an outer layer so as to form a pocket in the surface

intussusception (verb)	intussuscept (verb)
	introvert or invaginate