Third-person singular simple present indicative form of cosponsor.(verb)
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Use "cosponsors" in a sentence
"Please spend 2008 trying to get Emily's List and other progressive women's groups behind your effort to censor the "cosponsors" of this heinous bill."
"It was written to restrict development and preserve wilderness along several beautiful and unspoiled rivers, and he was having trouble finding cosponsors."
"But his bill had some good ideas and has drawn almost as many Republican cosponsors as democrats."