flocks / phlox are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
flocks: (noun) a church congregation guided by a pastor. (noun) a group of birds. (noun) a group of sheep or goats. (verb) move as a crowd or in a group.
phlox: (noun) any polemoniaceous plant of the genus Phlox; chiefly North American; cultivated for their clusters of flowers.
flocks: f·l·AA·k·s
phlox: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)