Synonyms of unsparing

1 Syllable
free, hard, strict, stern
2 Syllables
ruthless, lavish, trenchant, sterner, stricter, strictest, firstclass, hardshell, sternest, giving, soft-touch
3 Syllables
ungrudging, unstinting, freehanded, generous, liberal, profuse, severe, severest, abundant, merciless, severer, procrustean, relentless, bountiful, exacting
4 Syllables
openhanded, unrelenting, iron-handed, extravagant, iron-fisted, unmerciful, largehearted, ironfisted, munificent, profusive
5 Syllables
inexorable