There are several options for most collective nouns. For example a group of cats can be a glaring, a clowder, a pounce, or a cluster.
Here are some of my favourites:
- audit of bookkeepers
- babble of linguists
- bask of crocodiles
- bouquet of pheasants
- business of ferrets
- cackle of hyenas
- cancellation of trains
- charm of finches
- clique of photographers
- damning of jurors
- following of stalkers
- impatience of wives
- murder of crows
- number of mathematicians
- ostentation of peacocks
- parliament of owls
- rhumba of rattlesnakes
- shiver of sharks
- shuffle of bureaucrats
- smack of jellyfish
- sneer of butlers
- stack of librarians
- superfluity of nuns
- tower of giraffes