Middle Primitive Elvish
nus
root. sense, wisdom, sense, wisdom; *sense of smell
ñol-
noun. smell
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.
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.
A root in The Etymologies of the 1930s glossed “sense, wisdom”, with the derivative ON. nuhina > N. noen “wise, sensible” (EtyAC/NUS). This is probably a later iteration of unglossed ᴱ√NUSU from the Qenya Lexicon with variant ᴱ√NUFU, both with derivatives having to do with “✱the act of smelling” such as ᴱQ. nuste “sense of smell” and ᴱQ. nuvu- “smell, sniff at” (QL/68). Derivatives in the contemporaneous Gnomish Lexicon also had to do with “smell”, but there were also words like G. nus- “take notice, perceive” and G. nusimos “sagacity” (GL/61). Hence the early root was also connected to the meanings “perceptive” and “wise”. The verb ᴹQ. nusta- “smell” from the 1948 Quenya Verbal System (QVS) indicates Tolkien’s later conception of the root was also still connected to “(sense of) smell”.