Hastily rhymes with:
testily, accidentally, anecdotally, atalie, brutally, coincidentally, continentally, digitally, environmentally, experimentally, fatally, fundamentally, governmentally, heartily, horizontally, incidentally, incrementally, italy, jauntily, mentally, mightily, monumentally, mortally, natalie, nathalie, nattily, ornamentally, ottilie, philately, scantily, subtly, temperamentally, testily, totally, vitally, wittily
Hastily sounds like:
hachtel, haughtily, hostel, hostile, hustle