Wednesday Wordage odd man out edition

This week's puzzle is inspired by a road sign, and presented a la "Says You."

In each group, which is the odd man out?
1) ount, aint, oint, aunt, arat
2) enior, unior, onior, octor, ister
3) ood, ard, eriod, oad, ord
4) iss, oss, sland, ersus, insteinium

Highlight for a clue:The inspiring road sign was exit on Hwy 5 north of Salem for "St Paul   Mt Angel"
Highlight for the answers:
1) aunt.  The others are abbreviated by the letter "t"--Mt., St., Pt., Kt.
2) onior.  The others are abbreviated by the letter "r"--Sr., Jr., Dr., Mr.
3) ood.  The others are abbreviated by the letter "d"--Yd., Pd., Rd., Ld.
4) oss.  The others are abbreviated by the letter "s"--Ms., Is., Vs., Es.
Any other goodies?