thumbnut vs wing-nut

thumbnut and wing-nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
thumbnut	Yes	No	No	No
wing-nut	Yes	No	No	No

As nouns, thumbnut and wing-nut are synonyms defined as:

thumbnut and wing-nut: a threaded nut with winglike projections for thumb and forefinger leverage in turning

Other synonyms of thumbnut include butterfly nut, wing nut, wing screw.

thumbnut (noun)	wing-nut (noun)
a threaded nut with winglike projections for thumb and forefinger leverage in turning	a threaded nut with winglike projections for thumb and forefinger leverage in turning
	any tree of the genus Pterocarya; fruit is a small winged nutlet; Caucasus to southeastern Asia