Synonyms of nonvalid

nonvalid

adjective

ˌnän-ˈva-ləd 

1

as in unreasonable

having no basis in reason or fact

a nonvalid theory that most scientists rejected long ago

Synonyms & Similar Words

• unreasonable
• invalid
• unsupported
• irrational
• unwarranted
• unfounded
• false
• baseless
• unsubstantiated
• unnecessary
• absurd
• misleading
• unreasoned
• groundless
• weak
• wrong
• inconsistent
• illogical
• misled
• unconscionable
• untenable
• fallacious
• implausible
• stupid
• foundationless
• unconvincing
• gratuitous
• specious
• meaningless
• nonlogical
• unsound
• flimsy
• foolish
• insane
• silly
• unwise
• mad
• uncalled-for
• whacky
• fatuous
• lunatic
• asinine
• nutty
• ill-advised
• simpleminded
• wacky
• preposterous
• nonsensical
• crazy
• harebrained
• brainless
• senseless
• half-witted
• crackpot

Antonyms & Near Antonyms

• good
• valid
• reasonable
• hard
• justified
• just
• reasoned
• confirmed
• certified
• logical
• informed
• true
• wise
• real
• actual
• validated
• certain
• sensible
• rational
• well-grounded
• well-founded
• substantiated
• sane
• genuine
• sober
• sure
• verified
• corroborated
• clear
• solid
• plausible
• compelling
• satisfying
• convincing
• persuasive
• sound
• credible
• commonsense
• cogent

2

as in invalid

having no legal or binding force

failure to inform the suspect of his rights rendered his confession nonvalid

Synonyms & Similar Words

• invalid
• null
• void
• null and void
• illegal
• bad
• inoperative
• worthless
• nonbinding
• useless
• nugatory
• ineffective
• ineffectual

Antonyms & Near Antonyms

• good
• valid
• legal
• binding
• working