derv : deer
The Illunse word for deer is derv. Derv is a rare last name. Derv is a rare first name. DERV is a UK term for diesel fuel for cars and lorries (from Diesel Engine Road Vehicle). In Breton derv means oak.
This word is a mixture of the Latin word for deer which is cervus, and the Old English word for deer which is déor (wild beast (mostly in contrast to domestic animals); deer, reindeer).
My previous Illunse word for deer was derce.
dervas : deer (plural)
The Illunse word for deer (nominative plural) is dervas. Dervas is an ususual last name.
Deer (plural) in Latin is cervi. Deer (plural) in Old English is déor (plural is the same as the singular, something I've chosen not to do in Illunse).
Here's a link to Deer, in J.R.R. Tolkien's words.
By the way, I couldn't find a Quenya or a Sindarin word for tiger.