There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.

Qenya 

nusta-

verb. to smell [something]

Early Primitive Elvish

fawa

root. smell

A root in the Qenya Lexicon of the 1910s glossed “smell” along with several Qenya derivatives, most unglossed (QL/37). It seems this was a neutral “smell” root based on words in the contemporaneous Gnomish Lexicon, such as G. faust “smell, odour (neither pleasant nor unpleasant)” (GL/34). There are no signs of this root in Tolkien’s later writing.

Early Primitive Elvish [QL/037] Group: Eldamo. Published by

Early Quenya

nus

noun. smell

Early Quenya [QL/068] Group: Eldamo. Published by

Middle Primitive Elvish

ñol-

noun. smell

Middle Primitive Elvish [EtyAC/A; EtyAC/N] Group: Eldamo. Published by

Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.

Quenya 

nusta

verb. smell

Quenya [PE 22:103] Group: Mellonath Daeron. Published by

ñol-

smell

ñol- noun "smell" (VT45:5); strengthened aññol, q.v. Possibly ñol- should be regarded as simply the root underlying olmë, q.v.

nus

noun. smell

Sindarin 

nosta-

verb. to smell

Sindarin Group: Eldamo - neologism/reconstructions. Published by

thost

smell

(noun) thost (pl. thyst) _(VT46:19)__;

thost

smell

(pl. thyst) (VT46:19)

Noldorin 

thost

noun. smell

Noldorin [VT/46:19] Group: SINDICT. Published by

thost

noun. smell

Noldorin [EtyAC/THUS] Group: Eldamo. Published by