Appendix, overview
Verbtime considers the verbs in the following list as irregular er-verbs that are built accoring to the conjugation rules of ~e..er.
ascender
atender
cerner
condescender
contender
defender
desatender
descender
distender
encender
entender
extender
heder
hender
malentender
perder
reverter
sobrentender
tender
trascender
verter