intense, scholarly, superficial, fundamental, significant, important, deep, sincere, acute, , great, keen, extreme, hearty, heartfelt, abject, deeply felt, heartrending, wise, learned, serious, deep,...
Deep.
Deep, erudite, intellectual
Both are correct.
Synonym means: a word having the same or nearly the same meaning as another in the language. Definition means: the act of defining or making definite, distinct, or clear / the formal statement of the...