put down vs maintain

put down and maintain both are verbs.

Word	Noun	Adjective	Verb	Adverb
put down	No	No	Yes	No
maintain	No	No	Yes	No

As verbs, maintain is a hyponym of put down; that is, maintain is a word with a more specific, narrower meaning than put down:

put down (verb)	maintain (verb)
put down in writing; of texts, musical compositions, etc.	stick to correctly or closely
make a record of; set down in permanent form	state categorically
put in a horizontal position	state or assert
remove (cargo, people, etc.) from and leave	support against an opponent
cause to sit or seat or be in a settled position or place	maintain by writing regular records
put (an animal) to death	supply with necessities and support
reduce in worth or character, usually verbally	keep in safety and protect from harm, decay, loss, or destruction
cause to come to the ground	have and exercise
	maintain for use and service
	cause to continue in a certain state, position, or activity