jointly
The tournament is to be jointly hosted by India, Pakistan and Sri Lanka.

agree to, offer to
be keen to (BrE)
The country is very keen to host the Winter Olympics in six years' time.

a bid to host sth
the city's bid to host the Olympic Games in the year 2008

Host is used with these nouns as the object:
bash, ceremony, championship, concert, conference, convention, debate, dinner, evening, event, exhibit, exhibition, fair, feast, festival, final, forum, gala, game, gathering, guest, luncheon, meeting, party, premiere, programme, reception, seminar, show, site, summit, talk, tournament, website, workshop