tinker's damn vs tinker's dam

tinker's damn and tinker's dam both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinker's damn	Yes	No	No	No
tinker's dam	Yes	No	No	No

As nouns, tinker's damn and tinker's dam are synonyms defined as:

Other synonyms of tinker's damn include damn, darn, hoot, red cent, shit, shucks.

tinker's damn (noun)	tinker's dam (noun)
something of little value	something of little value