The difference between Doubtful and Hard

When used as nouns, doubtful means a doubtful person or thing, whereas hard means a firm or paved beach or slope convenient for hauling vessels out of the water.

When used as adjectives, doubtful means subject to, or causing doubt, whereas hard means having a severe property.

Hard is also adverb with the meaning: with much force or effort.

check bellow for the other definitions of Doubtful and Hard

  1. Doubtful as an adjective:

    Subject to, or causing doubt.

  2. Doubtful as an adjective:

    Experiencing or showing doubt, sceptical.

  3. Doubtful as an adjective:

    Undecided or of uncertain outcome.

  4. Doubtful as an adjective (obsolete):

    Fearsome, dreadful.

  5. Doubtful as an adjective:

    Improbable or unlikely.

  6. Doubtful as an adjective:

    Suspicious, or of dubious character.

  7. Doubtful as an adjective:

    Unclear or unreliable.

  1. Doubtful as a noun:

    A doubtful person or thing.

  1. Hard as an adjective (of material or fluid):

    Having a severe property; presenting difficulty. Resistant to pressure. Strong. High in dissolved chemical salts, especially those of calcium. Having the capability of being a permanent magnet by being a material with high magnetic coercivity (compare soft).

    Examples:

    "This bread is so stale and hard, I can barely cut it."

  2. Hard as an adjective (personal or social):

    Having a severe property; presenting difficulty. Requiring a lot of effort to do or understand. Demanding a lot of effort to endure. Severe, harsh, unfriendly, brutal. Difficult to resist or control; powerful.

    Examples:

    "a hard problem"

    "a hard life"

    "a hard master;  a hard heart;  hard words;  a hard character"

    "don't be so hard on yourself"

  3. Hard as an adjective:

    Unquestionable.

    Examples:

    "'hard evidence"

  4. Hard as an adjective (of a road intersection):

    Having a comparatively larger or a ninety-degree angle.

    Examples:

    "At the intersection, there are two roads going to the left. Take the hard left."

  5. Hard as an adjective (slang, vulgar, of a [[male]]):

    Sexually aroused.

    Examples:

    "I got so hard watching two hot guys wrestle each other on the beach."

  6. Hard as an adjective (bodybuilding):

    Having muscles that are tightened as a result of intense, regular exercise.

  7. Hard as an adjective (phonetics, uncomparable):

    Plosive. Unvoiced Velarized or plain, rather than palatalized

    Examples:

    "There is a hard ''c'' in "clock" and a soft ''c'' in "centre"."

    "'Hard ''k'', ''t'', ''s'', ''ch'', as distinguished from soft, ''g'', ''d'', ''z'', ''j''."

    "The letter m ru ж in Russian is always hard."

  8. Hard as an adjective (arts):

    Having a severe property; presenting a barrier to enjoyment. Rigid in the drawing or distribution of the figures; formal; lacking grace of composition. Having disagreeable and abrupt contrasts in colour or shading.

  9. Hard as an adjective (uncomparable):

    In the form of a hard copy.

    Examples:

    "We need both a digital archive and a hard archive."

  1. Hard as an adverb (manner):

    With much force or effort.

    Examples:

    "He hit the puck hard up the ice."

    "They worked hard all week."

    "At the intersection, bear hard left."

    "The recession hit them especially hard."

    "Think hard about your choices."

  2. Hard as an adverb (manner):

    With difficulty.

    Examples:

    "His degree was hard earned."

    "The vehicle moves hard."

  3. Hard as an adverb (obsolete):

    So as to raise difficulties.

  4. Hard as an adverb (manner):

    Compactly.

    Examples:

    "The lake had finally frozen hard."

  5. Hard as an adverb (now, archaic):

    Near, close.

  1. Hard as a noun (countable, nautical):

    A firm or paved beach or slope convenient for hauling vessels out of the water.

  2. Hard as a noun (uncountable, drugs, colloquial, slang):

    crack cocaine.

  3. Hard as a noun (motorsports):

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