Similar words: thoughtfulness, forgetful, joyfulness, carefulness, playfulness, painfulness, wakefulness, wastefulness. Meaning: [fə(r)'getfʊlnɪs] 
n. 1. tendency to forget 2. unawareness caused by neglectful or heedless failure to remember.
n. 1. tendency to forget 2. unawareness caused by neglectful or heedless failure to remember. 
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31. Is there any way that I can make up for my forgetfulness?
32. The lovers roamed around the fields in complete forgetfulness of the time.
33. Low air pressure makes people feel relaxed and creates forgetfulness.
34. How long will humanity continue to suffer in their forgetfulness?
35. All this is not to suggest that forgetfulness doesn't come at a price.
36. If there is one thing that upsets me, it's my forgetfulness.
More similar words: thoughtfulness, forgetful, joyfulness, carefulness, playfulness, painfulness, wakefulness, wastefulness, helpfulness, gracefulness, unlawfulness, gratefulness, watchfulness, faithfulness, thankfulness, truthfulness, peacefulness, cheerfulness, wonderfulness, resourcefulness, fullness, fretful, fretfully, regretful, regretfully, illness, coolness, wellness, stillness, casualness.