indiscriminately vs willy-nilly

indiscriminately and willy-nilly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
indiscriminately	No	No	No	Yes
willy-nilly	No	No	No	Yes

As adverbs, indiscriminately and willy-nilly are synonyms defined as:

Other synonyms of indiscriminately include arbitrarily, at random, every which way, haphazardly, randomly.

indiscriminately (adverb)	willy-nilly (adverb)
in a random manner	in a random manner
in an indiscriminate manner	without having a choice