«بُرْد» and «بَرْد»
Burd may denote a cloak, whereas bard denotes coldness.
The constituent consonants, their number and their order agree. What differs is vocalization, making this a typical case of muḥarraf jinās. In Arabic, a seemingly small change of vowel can produce a different lexical meaning.
«جُبَّةُ البُرْدِ جُنَّةُ البَرْدِ»
A cloak or garment provides protection from the cold.
Several phonetic pairings occur within the expression; each requires its own analysis. The mere presence of several similar words does not make every pairing the same subtype.