nouns
the property of relative size or extent (whether large or small)
"they tried to predict the magnitude of the explosion"; "about the magnitude of a small pea"
is a type of (narrower)
a basic or essential attribute shared by all members of a class
"a study of the physical properties of atomic particles"
is an attribute of
capable of being measured
"measurable depths"
a number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10
relative importance
"a problem of the first magnitude"
is a type of (narrower)
the quality of being important and worthy of note
"the importance of a well-balanced diet"