intussuscept vs intussusception

intussuscept is not a noun while intussusception is a noun.

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

intussuscept (noun)	intussusception (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

intussuscept (verb)	intussusception (verb)
introvert or invaginate