According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 6 words with the pattern IN--R. That is, five letter words with 1st letter I and 2nd letter N and 5th letter R. In alphabetical order, they are:
incur
infer
inker
inner
inter
invar
Jaguar.
Amber
Rien.
pear
Czar is a 4 letter word. It begins with C and ends with R.
icebreaker. illustrator. inventor. isomer.
alpine fir
jar...
The only word that starts with R and ends with J is 'RAJ'.
Jeer
Racoon.
Rover
I think it starts with a A no a R no a J
war, water, wafer, wager, waver, widower
A word that starts with S and ends with X is sphinx.
The ones who's starts with a J-R and lat name starts with a W-Z
Recorder is a musical instrument. It starts with r and ends with er.
Rose. Rene
I don't believe there is a bird with such a name...