abandon vs sell out

abandon is a noun but sell out is not a noun.

Word	Noun	Adjective	Verb	Adverb
abandon	Yes	No	Yes	No
sell out	No	No	Yes	No

As verbs, sell out is a hyponym of abandon; that is, sell out is a word with a more specific, narrower meaning than abandon:

abandon (noun)	sell out (noun)
the trait of lacking restraint or control; reckless freedom from inhibition or worry
a feeling of extreme emotional intensity

abandon (verb)	sell out (verb)
leave someone who needs or counts on you; leave in the lurch	abandon one's principles for expedience or financial gain
stop maintaining or insisting on; of ideas or claims	sell or get rid of all one's merchandise
leave behind empty; move out of
forsake, leave behind
give up with the intent of never claiming again