Synonyms for cooperative

modified

1. Helpful

   supportive, accommodating, neighborly; see helpful 1, kind.

2. Involving cooperation

   cooperating, agreeing, joining, combining, collaborating, collaborative, collegial, coactive, uniting, concurring, participating, symbiotic, coadjutant, collective, in joint operation; see also common 5, united.

   Antonyms competitive, independent*, rival.

noun