Synonyms of profound

1. profound (vs. superficial), deep, thoughtful, intense, scholarly: usage: showing intellectual penetration or emotional depth; "the differences are profound"; "a profound insight"; "a profound book"; "a profound mind"; "profound contempt"; "profound regret"
2. profound, intense (vs. mild): usage: of the greatest intensity; complete; "a profound silence"; "a state of profound shock"
3. fundamental, profound, significant (vs. insignificant), important: usage: far-reaching and thoroughgoing in effect especially on the nature of something; "the fundamental revolution in human values that has occurred"; "the book underwent fundamental changes"; "committed the fundamental error of confusing spending with extravagance"; "profound social changes"
4. profound, deep (vs. shallow): usage: coming from deep within one; "a profound sigh"
5. heavy, profound, sound, wakeless, deep (vs. shallow): usage: (of sleep) deep and complete; "a heavy sleep"; "fell into a profound sleep"; "a sound sleeper"; "deep wakeless sleep"
6. profound, unfathomed, unplumbed, unsounded, deep (vs. shallow): usage: situated at or extending to great depth; too deep to have been sounded or plumbed; "the profound depths of the sea"; "the dark unfathomed caves of ocean"-Thomas Gray; "unplumbed depths of the sea"; "remote and unsounded caverns"