What's the difference between penteconter and pentere?

Penteconter

Definition:

• (n.) A Grecian vessel with fifty oars.

Example Sentences:

Pentere

Definition:

Example Sentences:

• (1) Pathological ultrasound and EMG findings in parents and children of seemingly sporadic cases suggest to assume autosomal dominant inheritance with incomplete penterance in such cases.
• (2) The latter fibroma penterated the tympanic membrane.