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- Singular: Attorney General | Plural: Attorneys General
- Singular: Mother-in-law | Plural: Mothers-in-law
- Singular: Passerby | Plural: Passersby
- Singular: Commander-in-chief | Plural: Commanders-in-chief
- Singular: Court-martial | Plural: Courts-martial
- Singular: Toothbrush | Plural: Toothbrushes
- Singular: Stepchild | Plural: Stepchildren
- Singular: School bus | Plural: School Buses
- Singular: Father-in-law | Plural: Fathers-in-law
- Singular: Coat of Arm | Plural: Coats of Arms
- Singular: brother-in-law | Plural: brothers-in-law
- Singular: Runaway | Plural: Runaways
- Singular: Sergeant Major | Plural: Sergeants Major
- Singular: Forget-me-not | Plural: Forget-me-nots
- Singular: Merry-go-round | Plural: Merry-go-rounds
- Singular: Lay-by | Plural: Lay-bys
- Singular: Sister-in-law | Plural: Sisters-in-law
- Singular: Fisherman | Plural: Fishermen
- Singular: Spokesman | Plural: Spokesmen
- Singular: Editor-in-chief | Plural: Editors-in-chief
- Singular: Deputy director-general | Plural: Deputy directors-general
- Singular: Gentleman-at-arms | Plural: Gentlemen-at-arms
- Singular: Knight templar | Plural: Knights Templar
- Singular: Major general | Plural: Major generals
- Singular: Secretary-general | Plural: Secretaries-general
- Singular: Craftsman | Plural: Craftsmen
- Singular: Aircraftman | Plural: Aircraftmen
- Singular: Middleman | Plural: Middlemen
- Singular: Maiden over | Plural: Maidens over
- Singular: Journeyman | Plural: Journeymen
- Singular: Fireman | Plural: Firemen
