cosponsor
noun
co·spon·sor
(ˌ)kō-ˈspän(t)-sər
variants
or co-sponsor
plural cosponsors or co-sponsors
: a joint sponsor
The senator was a cosponsor for both bills.
Michigan Tech Student Relay For Life is a participating cosponsor of this event.—The Daily Mining Gazette
cosponsor
transitive verb
or co-sponsor
cosponsored or co-sponsored; cosponsoring or co-sponsoring
This year Simpson is carrying on the legislative struggle without Mazzoli, who has declined to cosponsor the bill without support from the Democratic House leadership …
—George Russell
The following summer, Bingham returned to Machu Picchu with an expedition co-sponsored by the National Geographic Society.
—Duane Damon
cosponsorship
noun
or co-sponsorship
Increasingly, large urban malls are being built with the co-sponsorship of city governments.
—Witold Rybczynski
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Merriam-Webster unabridged
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