abandon vs walk out

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

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

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

Other hyponyms of abandon include expose, ditch, maroon, strand.

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

abandon (verb)	walk out (verb)
leave someone who needs or counts on you; leave in the lurch	leave suddenly, often as an expression of disapproval
stop maintaining or insisting on; of ideas or claims	leave abruptly, often in protest or anger
leave behind empty; move out of	stop work in order to press demands
forsake, leave behind
give up with the intent of never claiming again