operation vs process

operation and process both are nouns.

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

As nouns, operation and process are synonyms defined as:

operation and process: (psychology) the performance of some composite cognitive activity; an operation that affects mental contents

Other synonyms of operation include cognitive operation, cognitive process, mental process.

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

operation: process or manner of functioning or operating
process: a sustained phenomenon or one marked by gradual changes through a series of states

Other hypernyms of operation include physical process.

operation (noun)	process (noun)
a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body	a sustained phenomenon or one marked by gradual changes through a series of states
(mathematics) calculation by mathematical methods	a particular course of action intended to achieve a result
activity by a military or naval force (as a maneuver or campaign)	a natural prolongation or projection from a part of an organism either animal or plant
a planned activity involving many people performing various actions	(psychology) the performance of some composite cognitive activity; an operation that affects mental contents
a process or series of acts especially of a practical or mechanical nature involved in a particular form of work	a mental process that you are not directly aware of
a business especially one run on a large scale	a writ issued by authority of law; usually compels the defendant's attendance in a civil suit; failure to appear results in a default judgment against the defendant
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

operation (verb)	process (verb)
	subject to a process or treatment, with the aim of readying for some purpose, improving, or remedying a condition
	perform mathematical and logical operations on (data) according to programmed instructions in order to obtain the required information
	deliver a warrant or summons to someone
	shape, form, or improve a material
	institute legal proceedings against; file a suit against
	deal with in a routine way
	march in a procession