There is no single English word that meets the criteria.
rah
rah or boo
Rah is not acceptable as a two-letter word, primarily because it has three letters. All the rest are fine.
rah is not an element of meaning in a Hebrew name.
"Raro" is an Italian equivalent of "rare."Specifically, the word is the masculine singular form of an Italian adjective. The pronunciation is "RAH-roh." The feminine singular form, "rara," is pronounced "RAH-rah."
Raja (Rah-Jah)
Lover - Sarameul (Sah Rah Mall)
"kara"Pronounced: kah-rah
RAH-pax
A good Hebrew word for 'evil' is "RAH" (רע)
Some four letter words that start with R and end with H are:rashrichrushRuth
I would guess EYE-rah-woe. Since you pronounce Isis (EYE-sis) and Ra (RAH).