Synonyms of subterranean
- 1 Syllable
- deep
- 2 Syllables
- buried, sunken, secret, chthonian, deeper, hush-hush, covert
- 3 Syllables
- underground, downreaching, infernal, underfoot, hypogean, hypogeal, private, hypogeous, sulphurous, covered
- 4 Syllables
- subterrestrial, subversive