-eth
Multiple Entries:-eth -th
Concise Oxford English Dictionary © 2008 Oxford University Press:
-eth1
▶suffix variant spelling of -th1 (as in fiftieth).
Concise Oxford English Dictionary © 2008 Oxford University Press:
-eth2 (also -th)
▶suffix archaic forming the third person singular of the present tense of verbs: doeth.
– origin OE -eth, -ath, -th.
Concise Oxford English Dictionary © 2008 Oxford University Press:
-th1 (also -eth)
▶suffix forming ordinal and fractional numbers from four onwards: sixth.
– origin OE -(o)tha, -(o)the.
Concise Oxford English Dictionary © 2008 Oxford University Press:
-th2
▶suffix forming nouns.
- 1 (from verbs) denoting an action or process: growth.
- 2 (from adjectives) denoting a state: filth.
– origin OE -thu, -tho, -th.
Concise Oxford English Dictionary © 2008 Oxford University Press:
-th3
▶suffix variant spelling of -eth2 (as in doth).
'-eth' also found in these Oxford entries:

