treenail vs trunnel

treenail and trunnel both are nouns.

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

As nouns, treenail and trunnel are synonyms defined as:

treenail and trunnel: 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 treenail include trenail.

treenail (noun)	trunnel (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