arbitrarily vs haphazardly

arbitrarily and haphazardly both are adverbs.

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

As adverbs, arbitrarily and haphazardly are synonyms defined as:

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

arbitrarily (adverb)	haphazardly (adverb)
in a random manner	in a random manner
	without care; in a slapdash manner