1.MAGNITUDE: Property of homoeomeric, homogen(e)ous, uniform, infinitively divisible entity into equal or not divisible parts/portions, measurable by units of measurements (measurable, uncountable nouns)
Relevant terms: a lot, much, a large amount/a little (of), large, big/small, little all/some, 1, 2, 3 portions, (kilograms/kilos, grades/degrees etc).
Property of an entity having two dimensions (height and length=area) plane, or three dimensions (length, width and height = volume) solid.
2. MULTITUDE: Property of similar, alike, uniform, definite and indivisible entities, countable by natural numbers (groups, plurality, plural number) (numerable, countable nouns).
Relevant terms: a lot, many, a large number/a few, large, big/small, little all/some, 1, 2, 3 of them