twopenny vs threepenny

twopenny and threepenny both are adjectives.

Word	Noun	Adjective	Verb	Adverb
twopenny	No	Yes	No	No
threepenny	No	Yes	No	No

As adjectives, twopenny and threepenny are synonyms defined as:

Other synonyms of twopenny include sixpenny, tuppeny, two-a-penny, twopenny-halfpenny.

twopenny (adjective)	threepenny (adjective)
of trifling worth	of trifling worth
	used of nail size; 1 1/4 in long