Confusable words

doubt vs suspect: what's the difference?

doubt
verb / noun
vs
suspect
verb / noun
? ?

This pair trips people up because the two words can point in almost opposite directions. If you doubt something, you lean toward not believing it. If you suspect something, you lean toward believing it, usually about something bad.

Doubt

verb / noun

To doubt something is to feel unsure about it or to lean toward not believing it.

  • I doubt he'll finish the report by Friday.
  • She has some doubt about whether the plan will work.

Suspect

verb / noun

To suspect something is to think it is probably true, often something negative, even without proof.

  • I suspect she already knows about the surprise party.
  • The police suspect the man who was seen near the scene.

Side by side

doubt suspect
General direction Leaning toward "probably not" Leaning toward "probably yes"
Common feeling Uncertainty A hunch, often about something wrong
Simple test "I doubt that's true" = you don't quite believe it "I suspect that's true" = you think it probably is

Quick rule

Doubt leans toward disbelief. Suspect leans toward belief, usually about something you can't yet prove.

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