Bringing up the rear, here. I just couldn’t get past HEART fitting in all of those word pairs:
LIONHEART / HEART ATTACK
SWEETHEART / HEARTLAND
HUNGRY HEART / HEARTSICK
So duh! Kevin Hart!
Alas, no, and it took me forever to back out of that rabbit hole to work the synonyms. Very clever puzzle, enjoyed it - even for as many times as I had to come back and revisit it!