Both "dependableness" and "dependability" are noun forms of the adjective "dependable," which means reliable or trustworthy. The two nouns refer to the quality of being dependable or the capacity to be relied upon consistently.

For instance, imagine you have a colleague at work who always completes tasks on time and never misses a deadline. You might say, "I appreciate Jane's dependableness; I can always count on her to get things done." You could also use "dependability" to replace "dependableness" in this context.

Although "dependableness" and "dependability" have the same meaning and can be used interchangeably, "dependability" is much more commonly used than "dependableness."

Synonyms of "dependableness" and "dependability" include:

  • reliability
  • trustworthiness
  • consistency
  • trustiness
  • faithfulness
  • accountability
  • fidelity

Example sentences

Dependableness

  1. His dependableness as a team leader earned him the trust of his colleagues.
  2. The company values employees who exhibit dependableness in their work.
  3. Dependableness is a crucial trait in customer service, as clients expect reliable assistance.
  4. The success of any long-term relationship relies on the dependableness of both partners.
  5. Her dependableness in meeting project milestones contributed to the team's success.

Dependability

  1. The success of our project was greatly attributed to Sarah's unwavering dependability in meeting deadlines.
  2. In the world of aviation, aircraft safety depends on the dependability of the engines.
  3. As a manager, one of his strengths is his dependability in handling crises calmly and effectively.
  4. The company's reputation for dependability has earned it a loyal customer base.
  5. When choosing a pet, many people consider the breed's dependability as a family companion.

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Reference:

Thesaurus results for DEPENDABLENESS
Synonyms for DEPENDABLENESS: reliability, reliableness, responsibility, dependability, trustworthiness, solidity, solidness, sureness; Antonyms of DEPENDABLENESS: unreliability, dubiousness, doubtfulness, questionableness, shakiness, dodginess, uncertainness
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dependability
1. the quality of being able to be trusted and being very likely to do what…
Cambridge Dictionary