| ruggedisation | (noun) the act of making a piece of equipment rugged (strengthening to resist wear or abuse) | Synonyms: ruggedization |
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| ruggedization | (noun) the act of making a piece of equipment rugged (strengthening to resist wear or abuse) | Synonyms: ruggedisation |
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| ruggedness | (noun) the property of being big and strong | Synonyms: huskiness, toughness |
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| (noun) the quality of being topologically uneven | - |
| (noun) the quality of being difficult to do | Synonyms: hardness |
| ruggelach | (noun) pastry made with a cream cheese dough and different fillings (as raisins and walnuts and cinnamon or chocolate and walnut and apricot preserves) | Synonyms: rugelach, rugulah |
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| rugger | (noun) a form of football played with an oval ball | Synonyms: rugby, rugby football |
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