15 at heart synonyms include basically, fundamentally, essentially, at bottom, deep down, in essence, intrinsically, innately, really, and actually. At heart is an adverb, and its antonyms are on the surface and superficially. Here are some additional synonyms for "at heart" with example sentences.
15 other ways to say at heart.
Despite his success, he remains humble at heart.
He's a leader at heart, always guiding others.
She may seem tough, but she's gentle at heart.