Antonyms of adj haphazard

2 senses of haphazard

Sense 1
haphazard, hit-or-miss -- (dependent upon or characterized by chance; "a haphazard plan of action"; "his judgment is rather hit-or-miss")

INDIRECT (VIA random) -> nonrandom -- (not random)

Sense 2
haphazard, slapdash, slipshod, sloppy -- (marked by great carelessness; "a most haphazard system of record keeping"; "slapdash work"; "slipshod spelling"; "sloppy workmanship")

INDIRECT (VIA careless) -> careful -- (exercising caution or showing care or attention; "they were careful when crossing the busy street"; "be careful to keep her shoes clean"; "did very careful research"; "careful art restorers"; "careful of the rights of others"; "careful about one's behavior")

Similarity of adj haphazard

2 senses of haphazard

Sense 1
haphazard, hit-or-miss -- (dependent upon or characterized by chance; "a haphazard plan of action"; "his judgment is rather hit-or-miss")
       => random (vs. nonrandom) -- (lacking any definite plan or order or purpose; governed by or depending on chance; "a random choice"; "bombs fell at random"; "random movements")

Sense 2
haphazard, slapdash, slipshod, sloppy -- (marked by great carelessness; "a most haphazard system of record keeping"; "slapdash work"; "slipshod spelling"; "sloppy workmanship")
       => careless (vs. careful) -- (marked by lack of attention or consideration or forethought or thoroughness; not careful; "careless about her clothes"; "forgotten by some careless person"; "a careless housekeeper"; "careless proofreading"; "it was a careless mistake"; "hurt by a careless remark")

Synonyms of adv haphazard

1 sense of haphazard

Sense 1
haphazard, haphazardly -- (without care; in a slapdash manner; "the Prime Minister was wearing a grey suit and a white shirt with a soft collar, but his neck had become thinner and the collar stood away from it as if it had been bought haphazard")