slapdash vs careless

slapdash and careless both are adjectives.

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

slapdash (adjective)	careless (adjective)
marked by great carelessness	marked by lack of attention or consideration or forethought or thoroughness; not careful
	effortless and unstudied
	(usually followed by `of') without due thought or consideration

slapdash (adverb)	careless (adverb)
in a careless or reckless manner
directly