at random vs indiscriminately

at random and indiscriminately both are adverbs.

Word	Noun	Adjective	Verb	Adverb
at random	No	No	No	Yes
indiscriminately	No	No	No	Yes

As adverbs, at random and indiscriminately are synonyms defined as:

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

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