Find Antonyms
valid Antonyms
Opposite of valid
Because the opposite of valid shifts with each meaning, the 14 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
• adjective (Context 1)
Having a sound basis in logic, fact, or reason; reasonable or cogent.
Usage Example
"The committee raised several invalid concerns regarding the environmental impact of the proposed construction."
Strongest
invalid
unfounded
baseless
groundless
illogical
unsound
Strong
specious
fallacious
• adjective (Context 2)
Legally or officially acceptable, binding, and in force; not expired or revoked.
Usage Example
"Travelers must present a invalid passport and visa before boarding the international flight."
Strongest
invalid
expired
void
null
Strong
illegitimate
counterfeit
• adjective (Context 3)
(of a logical argument or deduction) Constructed such that if the premises are true, the conclusion must necessarily be true.
Usage Example
"A syllogism can be formally invalid even if one of its underlying premises is factually mistaken."
Strongest
invalid
fallacious
Strong
incoherent
Similar words to valid
Words similar to valid shift depending on context. Common synonyms include:
well-founded
sound
legitimate
reasonable
binding
logical
legal
lawful
Cite this Entry
Wordmom. (2026). Antonyms for Valid. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/valid