Here are some 6 letter words that start with by:
1)Bypass
2)Bygone
3)Bombyx
4) Byline
5)Bypath
6)Byroad
6 Letter word starts with A is "Africa".
apples
NotaryNeatlyNumber
TroutThoughTeasedThirstTanker
Inact
· afraid
varied
insist
sister
incubi
Killer
Forest