Difference between Unlikely and Doubtful

UNLIKELY vs DOUBTFUL: NOUN

Fraught with uncertainty or doubt
Open to doubt or suspicion
Unsettled in mind or opinion
Unclear or unreliable
Suspicious, or of dubious character
Improbable or unlikely
Fearsome, dreadful.
Undecided or of uncertain outcome
Experiencing or showing doubt, sceptical
Of uncertain issue or event.
Characterized by ambiguity; dubious
Admitting of doubt; not obvious, clear, or certain; questionable; not decided; not easy to be defined, classed, or named.
Not settled in opinion; undetermined; wavering; hesitating in belief; also used, metaphorically, of the body when its action is affected by such a state of mind.
Raising doubts as to legitimacy, honesty, or respectability; suspicious.
Experiencing or showing doubt.
Of uncertain outcome; undecided.
Subject to or causing doubt.

Such as cannot be reasonably expected; improbable: as, an unlikely event.
Not holding out a prospect of success or of a desired result; likely to fail; unpromising.
Not calculated to inspire liking or affection; not likable or lovable.
In an unlikely manner; with no or little likelihood; improbably.

Full of doubt; having doubt; not settled in opinion.
Causing doubt; dubious; ambiguous; uncertain; not distinct in character, meaning, or appearance; vague: as, a doubtful expression; a doubtful hue.
Admitting of or subject to doubt; not obvious, clear, or certain; questionable.
In prosody, variable in quantity; capable of being pronounced or measured either as a long or as a short; common; dichronous.
Indicating doubt; disturbed by doubt.
Fearful; apprehensive; suspicious.
Of questionable or suspected character.
Of uncertain issue; precarious; shifting.

Impossible, Reluctant, Plausible, Inconceivable, Doubtful, Likely, Outside, Remote, Last, Unbelievable, Supposed, Unconvincing, Farfetched, Implausible, Improbable

Likely, Unclear, Debatable, Iffy, Probable, Unlikely, Dubitable, Incertain, In question, Tentative, Unsettled, Dubious, Uncertain, Unsure, Questionable

Impossible, Reluctant, Plausible, Inconceivable, Doubtful, Likely, Outside, Remote, Last, Unbelievable, Supposed, Unconvincing, Farfetched, Implausible, Improbable

Likely, Unclear, Debatable, Iffy, Probable, Unlikely, Incertain, In question, Dubitable, Tentative, Unsettled, Dubious, Uncertain, Unsure, Questionable

Obviously, in my case it is EXTREMELY unlikely.
John Mark might not be unlikely at all.
Spain but I think this one is unlikely.
Discountable effects are those extremely unlikely to occur.
NBA comeback may seem unlikely at this point.
Russia investigation even though his election seemed unlikely.
It indicates the null hypothesis is very unlikely.
Just as people who borrow murder mysteries are unlikely to be murderers, so those seeking information about terrorism are unlikely to be terrorists.
When looking for solutions to problems they are unlikely to arbitrarily rule out any possibilities, even if they may seem unlikely to others.
Responses can be: very likely, somewhat likely, neither likely or unlikely, somewhat unlikely and very unlikely.

Significant judgment is used to estimate doubtful accounts.
Bad debt expense Allowance for doubtful accounts thod was used, the existing balance in the Allowance for Doubtful Accounts was ignored.
Duke Energy Ohio Duke Energy Indiana Allowance for Doubtful Accounts Allowances for doubtful accounts are presented in the following table.
Allowances for doubtful accounts: All receivables that historically experience uncollectible accounts for doubtful accounts.
Rate for doubtful accounts would debit actual amount of course, two allowance doubtful accounts financial statements for each of allowing.
At each balance sheet date, the Company provides for doubtful accounts on the basis of specific identified doubtful receivables.
The allowance for doubtful accounts and the existing guarantees are sufficient to cover doubtful trade receivables.
No one must be allowed to profit from drug of doubtful safety or doubtful efficacy.
Yet it presents the difficult question: How doubtful is doubtful?
So good luck with them changing, doubtful very doubtful.