• haitin,
• hairing,
• haitain,
• harpon,
• sharpin,
• haroin,
• hirin,
• hapin,
• happin,
• harmin,
• harpie,
• hair-pin,
• hirpin,
• harpin,
• haripin,
• hairpinn,
• haarpin,
• hearpin,
• herpin,
• hircien

• Harbin,
• harbinger,
• harpoon,
• harpin,
• harvin.

The adjective form of "hairpin" is "hairpin-like".

The plural of the "hairpin" can be the "hairpins".

The singular of the "hairpin" can be the "hairpin".