• gairtonic,
• bairtonic,
• nairtonic,
• jairtonic,
• uairtonic,
• yairtonic,
• hzirtonic,
• hsirtonic,
• hwirtonic,
• hqirtonic,
• haurtonic,
• hajrtonic,
• hartonic,
• hayrtonic,
• hairtonik,
• haer tonic,
• hayrtonik,
• hairtonick,
• hayrtonec,
• haertonick

• hardening,
• hair tonic,
• harton,
• Harten,
• Hardin,
• hard-on,
• Hardimon,
• harden,
• hartin.

The adjective form of the word "hairtonic" is "hairtonic". It remains the same in both noun and adjective forms.

The plural form of the word "hairtonic" is "hairtonics".

The singular form of the word "hairtonic" is "hairtonic". The word does not change when referring to a single item or unit.