Confusable words

compose vs comprise: what's the difference?

compose
verb
vs
comprise
verb
? ?

Compose and comprise both describe how parts relate to a whole, but they point in opposite directions, and comprise is one of the most misused verbs in English.

Compose

verb

Compose means the parts make up the whole. The smaller pieces come first, and together they form the bigger thing.

  • Twelve players compose the team.
  • Water is composed of hydrogen and oxygen.

Comprise

verb

Comprise means the whole contains the parts. The bigger thing comes first, and it comprises, or includes, the smaller pieces.

  • The team comprises twelve players.
  • The book comprises three main sections.

Side by side

compose comprise
Direction Parts to whole Whole to parts
Common error "is comprised of" is technically incorrect
Simple test "Twelve players compose the team" "The team comprises twelve players"

Quick rule

The parts compose the whole. The whole comprises the parts. Strictly speaking, avoid "comprised of," since comprise already means "made up of" on its own.

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