Eterne,† see ERN.
ERP.
Discerp,† see IRP.
ERSE.
Verse, absterse, adverse, averse, converse, disperse, immerse, perverse, reverse, asperse, intersperse, universe, amerce, coerce, hearse, purse, curse, etc.
ERT.
Wert, advert, assert, avert, concert, convert, controvert, desert, divert, exert, expert, insert, invert, pervert, subvert, shirt, dirt, hurt, spurt,§ etc.
ERTH.
Berth, birth, mirth, earth, worth, etc.
ERVE.