slapdash vs haphazard

slapdash and haphazard both are adjectives.

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

As adjectives, slapdash and haphazard are synonyms defined as:

Other synonyms of slapdash include slipshod, sloppy.

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

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