haphazard vs slapdash

haphazard and slapdash both are adjectives.

Word	Noun	Adjective	Verb	Adverb
haphazard	No	Yes	No	Yes
slapdash	No	Yes	No	Yes

As adjectives, haphazard and slapdash are synonyms defined as:

Other synonyms of haphazard include slipshod, sloppy.

haphazard (adjective)	slapdash (adjective)
marked by great carelessness	marked by great carelessness
dependent upon or characterized by chance

haphazard (adverb)	slapdash (adverb)
without care; in a slapdash manner	in a careless or reckless manner
	directly