Modifiers matching bar:

• straight,
• thin,
• iron,
• fixed,
• round,
• solid,
• longitudinal,
• weighted,

Simple categories matching straight:

• member,
• line,
• weapon,
• object,
• connector,
• piece,
• bar,
• abrasive,
• structure,
• limb,
• path,
• seam,
• plate,
• stick,
• surface,
• edge,
• form,
• device,
• vessel,
• wall,
• tree,
• activity,
• conductor,
• tool,
• thing,
• material,
• road,
• stock,
• side,
• wood,
• part,
• blade,
• tube,
• pin,
• fertilizer,