What word am I thinking of?

[Helen_Combe]

Ooh, I think there may be one.

_ _ O _ _ I N_ N_ _ I _ N

[Alice Heritage]

How about an ululating u?

[Helen_Combe]

Sadly, the U is unexpressed.

[Manang Muyang]

Don't tell me this is another bird! Or maybe a fruit? In honor of the flora and fauna, A for Apple.

[Helen_Combe]

It is neither a bird nor a fruit and it has a literary source.

_ _ O _ _ I N_ NA _I A N

[Alice Heritage]

There's an R raring to go if I'm not mistaken.

[Helen_Combe]

Hear that R Roar!

_ R O _ _ I N_ NA _I A N

[Clinical1]

Is there an apple for teacher - with the Letter A?

[Helen_Combe]

Hello Clinical1, there are indeed a couple of As

_ R O _ _ I N_ NA _I A N

[Alice Heritage]

Looking for L.

[Helen_Combe]

Lolling about I’m afraid

_ R O _ _ I N_ NA _I A N

[Manang Muyang]

T should be there!

[Helen_Combe]

It should, but it isn’t. I shall have words

_ R O _ _ I N_ NA _I A N

It’s a rarely used word, want a clue?

[Alice Heritage]

Would like to C if there's a C ...

[Helen_Combe]

C is Cing other horizons