Modifiers matching convoy:

• vehicular,
• ceremonial,

Simple categories matching vehicular:

• weaponry,
• part,
• system,
• equipment,
• characteristic,
• transport,
• enclosure,
• area,
• accident,
• motion,
• route,
• language,
• surface,
• convoy,
• activity,
• event,
• subject,
• fuel,
• crime,
• traffic,
• unit,
• application,
• service,
• structure,
• information,