circumscribe vs decrease

circumscribe is not a noun while decrease is a noun.

Word	Noun	Adjective	Verb	Adverb
circumscribe	No	No	Yes	No
decrease	Yes	No	Yes	No

As verbs, decrease is a hypernym of circumscribe; that is, decrease is a word with a broader meaning than circumscribe:

Other hypernyms of circumscribe include lessen, minify.

circumscribe (noun)	decrease (noun)
	the act of decreasing or reducing something
	the amount by which something decreases
	a change downward
	a process of becoming smaller or shorter

circumscribe (verb)	decrease (verb)
restrict or confine within limits	decrease in size, extent, or range
draw a line around	make become smaller
to draw a geometric figure around another figure so that the two are in contact but do not intersect