settle down vs settle

settle down is not a noun while settle is a noun.

Word	Noun	Adjective	Verb	Adverb
settle down	No	No	Yes	No
settle	Yes	No	Yes	No

As verbs, settle down and settle are synonyms defined as:

settle down and settle: become settled or established and stable in one's residence or life style

Other synonyms of settle down include root, steady down, take root.

As verbs, settle down and settle are synonyms defined as:

settle down and settle: settle into a position, usually on a surface or ground

settle down (noun)	settle (noun)
	a long wooden bench with a back

settle down (verb)	settle (verb)
become settled or established and stable in one's residence or life style	take up residence and become established
become quiet or calm, especially after a state of agitation	form a community
settle into a position, usually on a surface or ground	become settled or established and stable in one's residence or life style
	establish or develop as a residence
	make final; put the last touches on; put into final form
	become resolved, fixed, established, or quiet
	come as if by falling
	bring to an end; settle conclusively
	settle conclusively; come to terms
	end a legal dispute by arriving at a settlement
	come to terms
	accept despite lack of complete satisfaction
	get one's revenge for a wrong or an injury
	fix firmly
	arrange or fix in the desired order
	come to rest
	settle into a position, usually on a surface or ground
	cause to become clear by forming a sediment (of liquids)
	sink down or precipitate
	go under
	become clear by the sinking of particles
	dispose of; make a financial settlement