1. Precautionary.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• percautions,
• precauions,
• procautions,
• precautious,
• precatuions,
• precation,
• precautionst,
• precuations,
• precauitons,
• recations,
• precortions,
• precations,
• precautiions,
• precatious,
• precausions,
• precautins,
• precotions,
• prcautions,
• procaustions,
• precutions

• practise,
• practitioner,
• practised,
• practice,
• precautionary,
• proctitis,
• practician,
• practiced,
• precautional,
• practicum,
• precaution,
• preciado,
• practical,
• precative.

The adjective form of the word "precautions" is "precautionary".

The plural of the "precautions" can be the "precautions".

The singular of the "precautions" can be the "precaution".