cooperative
adjective
°Ready to work with another person or in a team; ready to cooperate.
noun
°A type of company that is owned partially or wholly by its employees, customers or tenants. Abbreviation: co-op.
helpful
adjective
°Furnishing help; giving aid; useful.
reliable
adjective
°Suitable or fit to be relied on; worthy of dependence or reliance; trustworthy.
"A reliable witness to the truth of the miracles. -- Andrews Norton."
°Such that either a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didn't.
noun
°Something or someone reliable.
synonyms: secure
uncooperative
adjective
°Not cooperative.
rude
adjective
°Bad mannered.
°Obscene, pornographic, offensive.

"suggestions" is not in the dictionary.

unfriendly
adjective
°not friendly; hostile.
°unfavourable.
possibility
noun
°The quality of being possible.
°A thing possible; that which may take place or come into being.
synonyms: option, choice, contingency

"team-building" is not in the dictionary.