Synonym: utility. Similar words: carefulness, wastefulness, wakefulness, gracefulness, gratefulness, peacefulness, resourcefulness, joyfulness. Meaning: [juːsfʊlnɪs] 
n. the quality of being of practical use.
n. the quality of being of practical use. 181. Transillumination has been improved in its usefulness in the diagnosis of breast diseases by the addition of computerized infrared light scanning techniques.
More similar words: carefulness, wastefulness, wakefulness, gracefulness, gratefulness, peacefulness, resourcefulness, joyfulness, forgetfulness, helpfulness, painfulness, playfulness, truthfulness, watchfulness, cheerfulness, unlawfulness, thankfulness, faithfulness, wonderfulness, thoughtfulness, fullness, useful, usefully, be useful to, remorseful, purposeful, suspenseful, purposefully, illness, wellness.