Qenya
lamba
noun. tongue
lamba
noun. hammer
namba
noun. hammer
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A noun for “a hammer” in The Etymologies of the 1930s under the root ᴹ√NDAM “hammer, beat” (Ety/NDAM). Tolkien wrote an l/ above this word, possibly indicating a variant form lamba (EtyAC/NDAM). This variant is consistent with the alternate form of the root: ᴹ√DAM (EtyAC/NDAM). I would stick to namba “hammer” for purposes of Neo-Quenya.
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. artan (artam-) or tartan “hammer” (QL/32), the second variant also appearing with a stem form tartam- under the early root ᴱ√TARA(MA) “to batter, thud, beat” (QL/89). Other early “hammer” words include ᴱQ. petl “hammer” under the early root ᴱ√PETE (QL/73) and ᴱQ. tonga “a great hammer” under the early root ᴱ√TOŊO “to hammer” (QL/94).