smidge vs smidgen

smidge and smidgen both are nouns.

Word	Noun	Adjective	Verb	Adverb
smidge	Yes	No	No	No
smidgen	Yes	No	No	No

As nouns, smidge and smidgen are synonyms defined as:

Other synonyms of smidge include iota, scintilla, shred, smidgeon, smidgin, tittle, whit.

smidge (noun)	smidgen (noun)
a tiny or scarcely detectable amount	a tiny or scarcely detectable amount