trunnel vs treenail

trunnel and treenail both are nouns.

Word	Noun	Adjective	Verb	Adverb
trunnel	Yes	No	No	No
treenail	Yes	No	No	No

As nouns, trunnel and treenail are synonyms defined as:

trunnel and treenail: a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast

Other synonyms of trunnel include trenail.

trunnel (noun)	treenail (noun)
a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast	a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast