As adverbs the difference between heedily and seedily
is that heedily is (obsolete) heedfully; attentively while seedily is in a seedy way.
heedily
English
Adverb
(
en adverb)
(obsolete) Heedfully; attentively.
*, II.17:
*:if heedily he endevour to measure and count them, he shall finde that what he did by nature and chance, he cannot doe it so exactly by desseign.