united — made into or caused to act as a single entity: a united front.
combined — A combined effort or attack is made by two or more groups of people at the same time.
confined — If something is confined to a particular place, it exists only in that place. If it is confined to a particular group, only members of that group have it.
held — simple past tense and a past participle of hold1 .
joined — to bring in contact, connect, or bring or put together: to join hands; to join pages with a staple.
kept — simple past tense and past participle of keep.
limited — confined within limits; restricted or circumscribed: a limited space; limited resources.
remained — to continue in the same state; continue to be as specified: to remain at peace.
restrained — characterized by restraint: The actor gave a restrained performance.