Synonyms for Grave:

adj.

all (adjective)
sober, solemn, grievous, heavy, weighty, sedate.
critical (adjective)
pivotal.
dangerous (adjective)
ominous.
deep (adjective)
extreme.
important (adjective)
consequential, pivotal, distinguished, salient, considerable, influential, momentous, big-wig, notable, world-shaking, critical, eminent, prominent, important, big-name, crucial, high-powered, heavyweight, earthshaking, noteworthy, serious.
serious (adjective)
sedate, somber, earnest, intense, solemn, demure, dignified, sober, grim.
serious; gloomy (adjective)
heavy, somber, solemn, earnest, sedate, dignified, grim, sober.
severe (adjective)
severe.

n.

black, beatific, absent, brooding, darkly, dark, appealing, bleak, bug-eyed, curious. crypt, Ossuary, diacritic, keep, dieresis, sepulcher, place, catacomb, mausoleum, vault, circumflex, accent, sepulture, tilde, cinerarium, umlaut, cedilla. fix, imprint, disturbing, impress, anxious, alarming, tense, stressful, worrying, distressing, stamp. gravestone, graveside, cemetery, dolmen, headstone, barrow, burial ground, graveyard, churchyard. death toll, death rate, bereavement, dying, mortality, morbidity, death, demise, death throes, fatality. burial ground (noun)
cemetery.
burial place (noun)
sepulcher, tomb, catacomb, crypt, vault, mausoleum.
grave (noun)
important, sedate, dangerous, sober, inscribe, sculpt, solemn, critical, grave accent, sculpture, of import, weighty, serious, grievous, heavy, severe, tomb, engrave.
tomb (noun)
mausoleum.

v.

contact (verb)
sculpture, sculpt.

Other synonyms:

distressing, Ossuary, mausoleum, gravestone, cedilla, circumflex, diacritic, graveyard, dolmen, tilde, rigorous, sepulture, churchyard, umlaut, worrying, disturbing, burial ground, desperate, vault, graveside, cinerarium, carve, stressful, catacomb, dieresis. accent, tense, death, dire, ominous, barrow, brooding. imprint, incise, extreme, anxious. awful. stamp. impress, fix. burial ground
cemetery.
engrave
inscribe, imprint.
gravestone
headstone.
tomb
tomb, sepulcher.
vault
crypt.

Usage examples for grave

  1. In that One Great Spirit meet All things mighty, grave and sweet. – Callista by John Henry Cardinal Newman
  2. Her grave is not so many miles from here." – The U.P. Trail by Zane Grey
  3. No, no, I must carry it with me,- carry it with me to the grave – The Sport of the Gods by Paul Laurence Dunbar