retrench vs retrenchment

retrench is not a noun while retrenchment is a noun.

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

retrench (noun)	retrenchment (noun)
	the reduction of expenditures in order to become financially stable
	entrenchment consisting of an additional interior fortification to prolong the defense

retrench (verb)	retrenchment (verb)
make a reduction, as in one's workforce
tighten one's belt; use resources carefully