schematisation vs diagramming

schematisation and diagramming both are nouns.

Word	Noun	Adjective	Verb	Adverb
schematisation	Yes	No	No	No
diagramming	Yes	No	No	No

As nouns, schematisation and diagramming are synonyms defined as:

schematisation and diagramming: providing a chart or outline of a system

Other synonyms of schematisation include schematization.

schematisation (noun)	diagramming (noun)
providing a chart or outline of a system	providing a chart or outline of a system
the act of reducing to a scheme or formula