indiscriminately vs arbitrarily

indiscriminately and arbitrarily both are adverbs.

Word	Noun	Adjective	Verb	Adverb
indiscriminately	No	No	No	Yes
arbitrarily	No	No	No	Yes

As adverbs, indiscriminately and arbitrarily are synonyms defined as:

Other synonyms of indiscriminately include at random, every which way, haphazardly, randomly, willy-nilly.

indiscriminately (adverb)	arbitrarily (adverb)
in a random manner	in a random manner
in an indiscriminate manner