grieving vs sorrowing

grieving and sorrowing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
grieving	No	Yes	No	No
sorrowing	No	Yes	No	No

As adjectives, grieving and sorrowing are synonyms defined as:

Other synonyms of grieving include bereaved, bereft, grief-stricken, mourning.

grieving (adjective)	sorrowing (adjective)
sorrowful through loss or deprivation	sorrowful through loss or deprivation