Difference between Ineligible and Invalid

INELIGIBLE vs INVALID: NOUN

Someone who is incapacitated by a chronic illness or injury
Hence Something that is damaged, or the worse for wear, but not so much as to be wholly unserviceable.
A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health who is unable to care for himself.
One who is confined to home or bed because of illness, disability or injury
Any person with a disability.
An infirm or sickly person; one who is affected by disease or disabled by any infirmity.

Prohibited by official rules
Not eligible; not qualified to be chosen (for an office, post, position); not worthy to be chosen or preferred; not expedient or desirable.
Unworthy of being chosen; unfit.
Disqualified by law, rule, or provision.
Not eligible

Not eligible, in general; unworthy of choice; unsuitable; inexpedient: as, an ineligible site for a building.
Specifically, not eligible to a specified office or post of honor; legally or otherwise disqualified.

Not valid; of no force, weight, or cogency; weak.
In law, having no validity or binding force; wanting efficacy; null; void: as, an invalid contract or agreement.
Deficient in health; infirm; weak; sick.
To affect with disease; render an invalid: chiefly in the past participle.
To register as an invalid; enroll on the list of invalids in the military or naval service; give leave of absence from duty on account of ill health.
To cause one's self to be registered as an invalid.

Excluded, Qualified, Impermissible, Qualify, Invalid, Unfit, Eligibility, Eligible, Legal, Undesirable, Unentitled, Unqualified, Illegal, Unsuitable, Disqualified

Disable, Sophistic, Sophistical, False, Spurious, Void, Uncollectible, Specious, Fallacious, Nugatory, Expired, Unsound, Nullified, Invalidated, Null

Excluded, Qualified, Impermissible, Qualify, Invalid, Unfit, Eligibility, Eligible, Legal, Undesirable, Unentitled, Unqualified, Illegal, Unsuitable, Disqualified

Disable, Sophistic, Sophistical, False, Spurious, Void, Uncollectible, Specious, Fallacious, Nugatory, Expired, Unsound, Nullified, Invalidated, Null

Criminal aliens ineligible to be considered for release.
Reasonable Opportunity, the applicant is ineligible for benefits.
When a child is found ineligible for special education during a reevaluation, the reevaluation that found the student ineligible is billable.
Applicants who are on academic probation or who are ineligible to continue graduate study at another university are ineligible for admission.
Is my supplier in any way ineligible to participate in an ITAR export transaction because they have become ineligible under the ITAR?
Members with two consecutive PFA failures remain ineligible for advancement and ineligible for participation in the advancement exam.
Likewise, the mere recitation of what would otherwise be ineligible subject matter in a claim does not render that claim ineligible.
Ineligible Hospital Any services rendered or supplies provided while you are confined in an Ineligible Hospital.
Ineligible charges: service charges which are ineligible for HB cannot be covered by a DHP.
Ineligible tone is heard when an observed call becomes ineligible for observation.

Agreement is unenforceable or invalid shall not render any other provision of this Agreement unenforceable or invalid.
Use the Ignore Fields with Invalid Types property to replace data of invalid data types with default values.
Short error: Invalid Task Attribute Map Id or Invalid Task Attribute Value.
If any part of the regulations promulgated is declared invalid, all parts that are severable from the invalid parts shall remain in effect.
Once a thirdparty buys without actual knowledge of the invalid lien, that transaction will not be undone notwithstanding the invalid lien.
Directory does not automatically clean up invalid objects, but invalid objects and attributes appear in searches and can be deactivated manually.
Invalid Arrest Warrant: a criminal case WILL NOT be dismissed on the basis of an invalid arrest warrant.
Error Message: Invalid Warehouse or Warehouse Not Available You have entered an invalid warehouse.
If you enter an invalid path or name, a message appears indicating that the output MSI file name is invalid.
Will is invalid if the condition imposed is invalid or contrary to law.