penning vs fabrication

penning and fabrication both are nouns.

Word	Noun	Adjective	Verb	Adverb
penning	Yes	No	No	No
fabrication	Yes	No	No	No

As nouns, fabrication is a hyponym of penning; that is, fabrication is a word with a more specific, narrower meaning than penning:

penning (noun)	fabrication (noun)
the act of creating written works	the act of making something (a product) from raw materials
	the act of constructing something (as a piece of machinery)
	writing in a fictional form
	the deliberate act of deviating from the truth
	a deliberately false or improbable account