My dictionary gives the same meaning for Inis and Oilean as "island." Is there any difference in the meanings or usuage between the two words or can they be used interchangeably? Also, are there any geographical preferences for either word?

Go raibh maith agaibh,

Dáithí

Hmmm. Mine says:

Inis - an island; grazing field
Oilean - Island

An online dictionary says this for Oilean.

Oilean - desert island

So.....I'm not sure if they can be used interchangeably.

Den Fhoclóir Beag :
Inis : oileán
Oileán : talamh agus uisce thart air, inis, aon ní atá soite amach óna thimpeallacht (oileán sráide)

I'm tempted to think that 'inis' would be used solely as a piece of land surrounded by water. ....only tempted 'til someone tells me I'm wrong.... I'll bet any time now. LOL! :-))

Here's how I understand this.

"Inis" is an old word. Nowadays you only hear it in placenames, like Inis Mór, Inisheer, Inis Bó Finne, etc. Also the name of the town of Ennis is from the Irish word "Inis".
Oileán is the modern Irish word for 'island', the word people use to describe an island in ordinary speech and writing nowadays. Hope this helps, Liz

James5, Maidhc_Ó_g, Liz,

Thanks for your help. I was wondering if Inis was to Oileán as Isle is to Island, and looks like it is as Liz points out.

Go raibh maith agaibh,

Dáithí