1. A genus of prickly plants; the national emblem of Scotland.

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

• wistle,
• throtle,
• thisled,
• thotle,
• thist,
• thirstly,
• thissle,
• mistle,
• whistly,
• thisty,
• thottle,
• thisle,
• thisto,
• thistime,
• thisl,
• hoistle,
• thislte,
• thistel,
• phthisise,
• thustle

The adjective form of the word "thistle" would be "thistly".

The plural of the "thistle" can be the "thistles".

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