| rival | (adjective) as a rival in a competition | - |
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| (noun) the contestant you hope to defeat | Synonyms: challenger, competition, competitor, contender |
| (verb) be the rival of, be in competition with | - |
| (verb) be equal to in quality or ability | Synonyms: equal, match, touch |
| rivalrous | (adjective) eager to surpass others | Synonyms: emulous |
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| rivalry | (noun) the act of competing as for profit or a prize | Synonyms: competition, contention |
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| rive | (verb) tear or be torn violently | Synonyms: pull, rend, rip |
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| (verb) separate or cut with a tool, such as a sharp instrument | Synonyms: cleave, split |
| river | (noun) a large natural stream of water (larger than a creek) | - |
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| riverbank | (noun) the bank of a river | Synonyms: riverside |
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| riverbed | (noun) a channel occupied (or formerly occupied) by a river | Synonyms: river bottom |
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| riverside | (noun) the bank of a river | Synonyms: riverbank |
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| rivet | (noun) heavy pin having a head at one end and the other end being hammered flat after being passed through holes in the pieces that are fastened together | - |
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| (noun) ornament consisting of a circular rounded protuberance (as on a vault or shield or belt) | Synonyms: stud |
| (verb) direct one's attention on something | Synonyms: center, centre, concentrate, focus, pore |
| (verb) hold (someone's attention) | - |
| (verb) fasten with a rivet or rivets | - |
| riveter | (noun) a machine for driving rivets | Synonyms: riveting machine, rivetter |
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| (noun) a worker who inserts and hammers rivets | Synonyms: rivetter |
| riveting | (adjective) capable of arousing and holding the attention | Synonyms: absorbing, engrossing, fascinating, gripping |
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| rivetter | (noun) a machine for driving rivets | Synonyms: riveter, riveting machine |
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| (noun) a worker who inserts and hammers rivets | Synonyms: riveter |
| rivulet | (noun) a small stream | Synonyms: rill, run, runnel, streamlet |
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| rivulus | (noun) found in small streams of tropical America; often kept in aquariums; usually hermaphroditic | - |
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