As nouns the difference between tinker and thinkeris that tinker is an itinerant tinsmith and mender of household utensils made of tin while thinker is one who spends time thinking, contemplating or meditating.
As a verb tinkeris to fiddle with something in an attempt to fix, mend or improve it, especially in an experimental or unskilled manner.
As a proper noun Tinkeris {from=occupations} for someone who mends pots and pans.