decoration vs marking

decoration and marking both are nouns.

Word	Noun	Adjective	Verb	Adverb
decoration	Yes	No	No	No
marking	Yes	No	No	No

As nouns, marking is a hyponym of decoration; that is, marking is a word with a more specific, narrower meaning than decoration:

decoration: the act of decorating something (in the hope of making it more attractive)
marking: the act of making a visible mark on a surface

decoration (noun)	marking (noun)
the act of decorating something (in the hope of making it more attractive)	evaluation of performance by assigning a grade or score
something used to beautify	the act of making a visible mark on a surface
an award for winning a championship or commemorating some other event	a pattern of marks
	a distinguishing symbol