According to Merriam-Webster, as transitive verbs, "lament" means:
1: to express sorrow, mourning, or regret for often demonstratively : MOURN
… must regret the imprudence, lament the result … — Jane Austen
2: to regret strongly
He lamented his decision not to go to college.
and "deplore" means:
1a: to feel or express grief for
deplore the death of a friend
b: to regret strongly
deplore my own actions
2: to consider unfortunate or deserving of deprecation
many critics deplore his methods
I was wondering what is a right verb to express one feels sad about some situations (inequality in society, spreading of wrong syntax, etc.).
According to the above, "deplore (2)" should be definitely usable. But I'm not sure about "lament (1)" as presented in the definition. Is it natural to say "he lamented the current war in Ukraine."? More generally, is there difference between these two words in terms of what can be the object?