@list of common words ending in true r

The only really common word ending in ar अर् is /punar "again". Counting all of the ar अर्-enders in the /mahAbhArata, /punar appears about a thousand times, and all the others together about a hundred times.

These are the most common in the /mahAbhArata, after /punar —

**prAtar प्रातर् "in the morning"

**mAtar मातर् "hey mom"

kSattar क्षत्तर् "hey charioteer"

**ahar अहर् "day"

**pitar पितर् "hey dad"

I guess that in modern Sanskrit kSattar क्षत्तर् is not so common.

upaplavyAd iha kSattar upAyAto janArdanaH |
उपप्लव्यादिह क्षत्तरुपायातो जनार्दनः ।
vRkasthale nivasati sa ca prAtar ihaiSyati ||
वृकस्थले निवसति स च प्रातरिहैष्यति ॥
"O Vidura, Janardana hath set out from Upaplavya.
He is now staying at Vrikasthala and will come here tomorrow."