Nouns

(n)lament, lamentation, plaint, waila cry of sorrow and grief“their pitiful laments could be heard throughout the ward”
(n)dirge, coronach, lament, requiem, threnodya song or hymn of mourning composed or performed as a memorial to a dead person
(n)elegy, lamenta mournful poem; a lament for the dead

Verbs

(v)lament, keenexpress grief verbally“we lamented the death of the child”
(v)deplore, lament, bewail, bemoanregret strongly“I deplore this hostile action”, “we lamented the loss of benefits”