retrenchment vs economy

retrenchment and economy both are nouns.

Word	Noun	Adjective	Verb	Adverb
retrenchment	Yes	No	No	No
economy	Yes	No	No	No

As nouns, economy is a hypernym of retrenchment; that is, economy is a word with a broader meaning than retrenchment:

retrenchment: the reduction of expenditures in order to become financially stable
economy: an act of economizing; reduction in cost

Other hypernyms of retrenchment include saving.

retrenchment (noun)	economy (noun)
the reduction of expenditures in order to become financially stable	an act of economizing; reduction in cost
entrenchment consisting of an additional interior fortification to prolong the defense	frugality in the expenditure of money or resources
	the efficient use of resources
	the system of production and distribution and consumption