How are Proto-Indo-European and Uralic languages possibly related?

A remote relationship between Proto-Indo-European and the Uralic languages is considered possible by some scholars, though it remains speculative and is not universally accepted.12

Evidence supporting a potential connection includes:

• Geographic Proximity: The earliest reconstructible locations of both language families were contiguous.1
• Grammatical Similarities: There are strong resemblances in basic grammatical elements, such as personal, demonstrative, interrogative, and relative pronouns, as well as personal verb endings and the accusative case ending -m.1
• Typological Features: Both families are typologically similar, characterized by the use of many suffixes and a lack of prefixes or infixes.1
• Shared Vocabulary: A very small number of words, such as those for "water" and "name," show potential cognates.1

Despite these points, lexical resemblances are generally very sparse. If a genetic relationship exists, the two families must have diverged thousands of years before the breakup of Proto-Indo-European. Most scholars do not consider a broader connection, such as the Nostratic hypothesis, to be supported by significant evidence.1