Category Nuances for howitzer:

• military,
• old,
• heavier,
• big,
• essential,
• large,
• larger,
• advanced,
• supportive,
• stationary,
• heavy,

Simple Categories for howitzer:

• gun,
• munition,
• equipment,
• artillery,
• ordnance,
• weaponry,
• system,
• arms,
• structure,
• unit,
• armament,