Squadron!
patrol
A group of ships is called a fleet of ships.
cabal
Irish Rovers
united
A company of soldiers is the answer you're looking for.
The collective noun starting with 're' is a regiment of soldiers.
The collective noun for a group of soldiers could be: Platoon of soldiers. Troop of soldiers. Patrol of soldiers. Squad of soldiers.
The collective nouns for a group of soldiers on patrol depends on the size of the group of soldiers, for example:a unit of soldiersa squad of soldiersa company of soldiersa platoon of soldiersa division of soldiersan army of soldiers
The collective noun for armour is a suit of armour (or suits of armour, if applicable).
The collective noun for ships is a fleet of ships.
The eight letter word that is a collective noun for listeners is an audience of listeners.
There is no specific collective noun for the noun guerillas. A collective noun for a similar group can be used, such as a troop of guerillas (a troop of soldiers) or a gang of guerillas (a gang of hoodlums), depending on your opinion of guerillas.
The collective noun is a gaggle of geese.
patrol
squadron
There is no specific collective noun for the noun cells, in which case a noun suitable for the situation is used; for example a group of cells, a cluster of cells, a formation of cells, etc.