• thinkinsg,
• thinkings,
• thynkings,
• rhinkins,
• fhinkins,
• ghinkins,
• yhinkins,
• 6hinkins,
• 5hinkins,
• tginkins,
• tbinkins,
• tninkins,
• tjinkins,
• tuinkins,
• tyinkins,
• thunkins,
• thjnkins,
• thinnkins,
• thynkins,
• Thynkuns

The adjective form of "thinkins" is "thinkinative". However, it is worth noting that "thinkinative" is not a commonly used word, and a more commonly used alternative might be "thoughtful".