willingness Willingness to correct is an indication of wisdom.
eagerness Pierre ate and drank a lot, with his usual eagerness.
alacrity I was shocked by the alacrity with which my typos and gaffes were pointed out.
ability He exceeds all his brothers in scholastic ability.
ripeness Figs should be consumed at the peak of ripeness.

Popularity over time

Use in printed books, per decade from 1850 to 2019.

By length

3 letters: set¹, art¹
4 letters: ease¹, zeal¹
5 letters: skill¹, craft¹, knack¹
7 letters: ability⁴, address², prowess², agility⁴, aptness
8 letters: capacity⁴, facility⁴, aptitude³, alacrity⁴, ripeness
9 letters: ingenuity⁵, dexterity⁴, eagerness³, alertness³, quickness², smartness²
10 letters: efficiency⁴, expedition⁴, competence³, cleverness³, promptness, expertness
11 letters: preparation⁴, willingness³, disposition⁴, inclination⁴, proficiency⁴, forwardness, promptitude
12 letters: preparedness⁴, cheerfulness³

The small number after each word is its number of syllables (ability⁴ = 4 syllables).