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.
nost
noun. birth; blood, high birth; birthday
nost-na-lothion
proper name. Birth of Flowers
tast
noun. total, amount
A word appearing as G. tast “total, amount” in the Gnomish Lexicon of the 1910s based on G. tath- “count” (GL/69), clearly based on the early root ᴱ√TAÞA (QL/90).
Neo-Sindarin: For purposes of Neo-Sindarin I would update this word to ᴺS. nost “total, amount” taking the later root √NOT “count” and combining it with the suffix ✶-dā “product of an action” (with t-d > st), so originally “✱a product of counting”.
baur
noun. house
eithlos
noun. family
A noun in the Gnomish Lexicon Slips of the 1910s glossed “family, etc.” of unclear derivation, though it may be related to G. eithog “ancestor, †father, sire” (PE13/113).
gwaren
noun. family
gwarin(n)
noun. family
The word G. {gwaren >>} gwarin(n) “family” appeared in the Gnomish Lexicon of the 1910s, derived from primitive ᴱ✶ŋuarenđā (GL/44). It was a combination of G. gwa- “together” and G. renni “family” (GL/65), but it is not clear why the e became i in the compound.
Neo-Sindarin: For purposes of Neo-Sindarin I would adapt this word as ᴺS. gwaren as a combination of later prefix gwa- “together” and the Neo-Root ᴺ√RE(N)D “kin”. Furthermore, I would use it specifically for a nuclear family (just the parents and children), as opposed to S. nos(s) which seems to refer to an extended family or clan.
renni
noun. family
A noun in the Gnomish Lexicon of the 1910s glossed “a family”, derived from the early root ᴱ√redh- having to do with kin (GL/65).
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 word appearing as G. {nort >>} nost in the Gnomish Lexicon of the 1910s with three distinct meanings: “birth”, “blood = high birth” and “birthday”, though the last sense also applied to the word G. {noss >>} nôs (GL/61). It is clearly based on the early root ᴱ√NŌ “become, be born” (QL/66). G. nosteg seems to be an adjectival variant in the phrase dana nosteg “birthday = ✱day of birth” (GL/61)
Neo-Sindarin: The usual Neo-Sindarin word for “birth” is ᴺS. onnad, gerund of the verb onna- “✱to give birth”; I’m not sure who coined this neologism, but it has been in use for some time.