spotting vs catching

spotting and catching both are nouns.

Word	Noun	Adjective	Verb	Adverb
spotting	Yes	No	No	No
catching	Yes	Yes	No	No

As nouns, spotting and catching are synonyms defined as:

spotting and catching: the act of detecting something; catching sight of something

Other synonyms of spotting include detection, espial, spying.

spotting (noun)	catching (noun)
the act of detecting something; catching sight of something	(baseball) playing the position of catcher on a baseball team
the act of spotting or staining something	the act of detecting something; catching sight of something
	becoming infected

spotting (adjective)	catching (adjective)
	(of disease) capable of being transmitted by infection