Aston devoted much study to the former question, but although he proved that in construction the two have a striking similarity, he could not find any corresponding likeness in their vocabularies.
Linguistically, Tibetan is allied to the Burmese languages, and forms with the latter a family of the so-called Turano-Scythian stock called " Tibeto-Burman " (q.v.), the unity of which family was first recognized by Brian Hodgson in 1828, and indeed several of the dialects of Tibetan are still only known through the copious vocabularies collected by him.
As separate publications there are several vocabularies of Chinese and Tibetan; Mongol and Tibetan; Chinese, Manchu, Mongol, Oelot, Tibetan and Turkish; Tibetan, Sanskrit, Manchu, Mongol and Chinese.
The dialects of Micronesia, though grammatically alike, differ widely in their vocabularies.
The modern term, IVF (in vitro fertilization), has replaced the colloquial "test tube baby" in both scientific and layman vocabularies.