put away vs sell up

put away and sell up both are verbs.

Word	Noun	Adjective	Verb	Adverb
put away	No	No	Yes	No
sell up	No	No	Yes	No

As verbs, sell up is a hyponym of put away; that is, sell up is a word with a more specific, narrower meaning than put away:

put away (verb)	sell up (verb)
turn away from and put aside, perhaps temporarily	sell or get rid of all one's merchandise
eat up; usually refers to a considerable quantity of food
kill gently, as with an injection
place in a place where something cannot be removed or someone cannot escape
stop using
throw or cast away
lock up or confine, in or as in a jail