Difference between Keep Down and Subdue

KEEP DOWN vs SUBDUE: NOUN

To subjugate (a region or people, for example) by military force.
To bring under control by physical force, persuasion, or other means; overcome.
To make less intense or prominent; reduce or tone down.
To bring (land) under cultivation.
To reduce the intensity or degree of; to tone down; to soften.
To make mellow; to break, as land; also, to destroy, as weeds.
To reduce to tenderness; to melt; to soften.
To bring under; to conquer by force or the exertion of superior power, and bring into permanent subjection; to reduce under dominion; to vanquish.
To overpower so as to disable from further resistance; to crush.
To destroy the force of; to overcome.
To render submissive; to bring under command; to reduce to mildness or obedience; to tame.
To overcome, as by persuasion or other mild means.

To conquer and bring into permanent subjection; reduce under dominion.
To overpower by superior force; gain the victory over; bring under; vanquish; crush.
To prevail over by some mild or softening influence; influence by association; assimilate; overcome, as by kindness, persuasion, entreaty, or other mild means; gain complete sway over; melt.
To bring down; reduce.
To tone down; soften; make less striking or harsh, as in sound, illumination, or color: in this sense generally in the past participle: as, subdued colors; a subdued light.
To improve by cultivation; make mellow; break, as land.
Synonyms and Vanquish, Subjugate, etc. (see conquer), crush, quell.
To soften.
Deal with successfully
Get on top of
Bring under control by force or authority

Keep apart, Dam up, Press down, Concentrate on, Keep back, Take hold, Do away with, Eat into, Swallow up, Subjugate, Number, Repress, Subdue, Quash, Reduce

Swim, Master, Reduce, Chasten, Mortify, Inhibit, Curb, Surmount, Quash, Tame, Conquer, Repress, Subjugate, Overcome, Suppress

Change state, Keep apart, Dam up, Press down, Concentrate on, Keep back, Take hold, Do away with, Eat into, Swallow up, Subjugate, Number, Subdue, Quash, Reduce

Get over, Swim, Master, Reduce, Chasten, Mortify, Inhibit, Curb, Surmount, Quash, Tame, Conquer, Subjugate, Overcome, Suppress

This helps to keep down weeds and conserve soil moisture.
Medicare payments in order to keep down cost growth.
This helps keep down the cost of insurance.
It will also keep down the insect pests.
Carpeting this area will help keep down noise.
They want to keep down dialogue between churches.
Fund IT innovation and technology development to safeguard article quality, review quality and ultimately to keep down journal operating costs down.
You will want to try to keep these FBA fees as minimal as possible to keep down your expenses.
We did it to keep down trouble, and to keep our hearts from being completely broken: that is as true as the gospel!
That way you can keep the flying critters out and keep down your Fleas at the same time.