catheterisation vs operation

catheterisation and operation both are nouns.

Word	Noun	Adjective	Verb	Adverb
catheterisation	Yes	No	No	No
operation	Yes	No	No	No

As nouns, operation is a hypernym of catheterisation; that is, operation is a word with a broader meaning than catheterisation:

catheterisation: the operation of introducing a catheter into the body
operation: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

Other hypernyms of catheterisation include surgery, surgical operation, surgical procedure, surgical process.

catheterisation (noun)	operation (noun)
the operation of introducing a catheter into the body	a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
	(mathematics) calculation by mathematical methods
	activity by a military or naval force (as a maneuver or campaign)
	a planned activity involving many people performing various actions
	a process or series of acts especially of a practical or mechanical nature involved in a particular form of work
	a business especially one run on a large scale
	the activity of operating something (a machine or business etc.)
	(psychology) the performance of some composite cognitive activity; an operation that affects mental contents
	(computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction)
	process or manner of functioning or operating
	the state of being in effect or being operative