trenail vs nog

trenail and nog both are nouns.

Word	Noun	Adjective	Verb	Adverb
trenail	Yes	No	No	No
nog	Yes	No	No	No

As nouns, nog is a hypernym of trenail; that is, nog is a word with a broader meaning than trenail:

trenail: a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast
nog: a wooden pin pushed or driven into a surface

Other hypernyms of trenail include peg.

trenail (noun)	nog (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 block built into a masonry wall so that joinery structure can be nailed to it
	a wooden pin pushed or driven into a surface