Similar words: dogged, doggedly, redness, tiredness, wickedness, preparedness, wretchedness, unexpectedness. Meaning: ['dɑgɪdnɪs /'dɒg-] 
n. persistent determination.
n. persistent determination. 
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1 His remarkable doggedness led him to carry on regardless when two stink bombs broke everyone else's concentration.
2 But it was nothing that doggedness couldn't cure.
3 Determination went hand in hand with doggedness.
4 I did all this with unnatural haste and doggedness; it was all too much for me.
5 Darwin's son Francis recalled his father's temperament: "Doggedness expresses his frame of mind almost better than perseverance."
6 Doggedness is the watchword here: with a sweltering equatorial sun and almost no freshwater,[www.Sentencedict.com] it is not long before 70-pound water-loaded packs begin to buckle knees and strain backs.
7 But such doggedness comes at the cost of further, perhaps fatal, rebellions.
8 And by doggedness and hard work Charles began to build up the reputation of the Grant's blend as a consistent, high quality product.
9 Most of my accomplishments came as the result of sheer doggedness.
10 Hers is a fame based not only on sheer doggedness, a quality held in high esteem by Koreans, but also on the universal human sympathy for a monumental — and in her case, cheerful — loser.
11 It is boosting trade with Sri Lanka and Bangladesh, and sticking, with commendable doggedness in the face of little encouragement, to the task of making peace with Pakistan.
More similar words: dogged, doggedly, redness, tiredness, wickedness, preparedness, wretchedness, unexpectedness, interrelatedness, doggerel, clogged, wednesday, ash wednesday, sadness, coldness, madness, boldness, candidness, mildness, hardness, loudness, goodness, fondness, kindness, staidness, weirdness, forwardness, shrewdness, awkwardness, for goodness sake.