Synonyms of heavily

2 Syllables
dully, thickly, strongly
3 Syllables
arduously, robustly, sturdily, rowdily, densely, gloomily, sluggishly, tediously, wearily, weightily, profoundly, solidly
4 Syllables
boisterously, invincibly, massively, dejectedly, ponderously, securely, exhaustingly, onerously, substantially
5 Syllables
burdensomely, troublesomely