How to say "tree" in Quenya

Ornë is one of two Quenya words for tree. Ornë comes from the root or- meaning rise up, be high. An ornë is a tree that is usually taller than wide, and typically smaller and slenderer than other trees when full-grown; it includes trees such as the birch (hwindë), the ash, and the rowan (farnë).

The other Quenya word for tree is alda. Aldar are wide and outspreading, and usually more robust than orni. Examples of aldar include the oak (nordo) and the beech (feren).

All the text and pictures in this post are from David Salo of the FB group "Conlang Learning Challenge", except what's written below this text

Aldar
oak : chêne
beech : hêtre
cedar : cèdre

pine : pin
 pine : sánë

Orni
birch : bouleau
ash : frêne
rowan : sorbier

rainbow : helyanwë

Yes, 'cause I'm still learning English too x)

To summarize

 
I could find myself the plural forms I don't have already, but I don't want to do any mistake, as there's no one to check what I write ^^'