euthanize vs put down

euthanize and put down both are verbs.

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

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

Other hyponyms of euthanize include destroy.

euthanize (verb)	put down (verb)
intentionally cause the painless death of a person or animal	put down in writing; of texts, musical compositions, etc.
	make a record of; set down in permanent form
	put in a horizontal position
	remove (cargo, people, etc.) from and leave
	cause to sit or seat or be in a settled position or place
	put (an animal) to death
	reduce in worth or character, usually verbally
	cause to come to the ground