info · Section 8: Punctuation and word count

Rule 8.7: Hyphenated words count as one word

A hyphenated group of words that functions as a single adjective before a noun, or as a compound technical noun built for clarity, counts as one word when counting sentence length — even though it is made of multiple hyphen-joined components.

What a checker looks for

Guidance rather than a pass-or-fail test.

  • When counting sentence length, count each whitespace-delimited hyphenated group (e.g. 'soap-and-water', 'trial-and-error', 'cutoff-switch') as one word — not the number of hyphen-joined components inside it.
  • When a phrase contains more than one whitespace-separated hyphenated group (e.g. 'main-gear-door retraction-winch handle'), count each group separately as one word each, not the whole phrase as a single word — this phrase is 3 words: 'main-gear-door' (1), 'retraction-winch' (1), 'handle' (1).
  • Apply this both to hyphenated compounds functioning as adjectives before a noun and to hyphenated technical nouns constructed for clarity.

What this rule does not cover

  • Do not confuse this word-counting rule with rule 8.2, which governs when a hyphen should be inserted in the first place — this rule only affects how an already-hyphenated group is counted.

How to fix it

When calculating sentence word count, treat each whitespace-delimited hyphenated word group as exactly one word; do not inflate the count by counting each hyphen-joined component separately, and do not collapse multiple separate hyphenated groups in one phrase into a single word count.

Constraints on the fix

  • Do not remove a correctly placed hyphen (see rule 8.2) in order to manipulate the word count.

Examples

Not STE: Clean the surface with a solution of soap and water.

STE: Clean the surface with a soap-and-water solution.

'soap-and-water' is a hyphenated compound and counts as one word, giving a 7-word sentence instead of a longer unhyphenated phrase.

Not STE: Use the method of trial and error.

STE: Use the trial-and-error method.

'trial-and-error' counts as one word.

Compliant, and worth knowing why

Move the main-gear-door retraction-winch handle.

This technical noun counts as 3 words: 'main-gear-door' (1 word), 'retraction-winch' (1 word), and 'handle' (1 word) — not 1 word for the whole phrase. There is no non-STE counterpart here; the standard's official example (page 1-8-8) is the noun phrase itself ('Main-gear-door retraction-winch handle (3 words)'), so the full sentence form here is adapted.

Related rules

Where this fits in AI governance

A rule a checker can test is a rule a model can be held to. The same discipline, on the governance side of this site.

Source

ASD-STE100 Issue 9, Section 8 - Punctuation and word count, page 1-8-8.

This page is commentary and does not reproduce the standard. About this rule pack.