change one letter

oil

boil

bail

mail

maul

maud

mud

bud

but

butt

mutt

mute

muted

mated

dated

fated

fazed (fluster somebody: to disconcert or disturb somebody)

I'll start to add descriptions/explanations so that this can also be an educational experience, too.

hazed

hazel (1. Small tree with edible nuts. Also called filbert. 2. Light-brown color with a tinge of green or gold, like a ripe hazelnut.]

haze (maybe a bit cheap solution, but it's easier to carry on from there)

And for N/A:
1 a : fine dust, smoke, or light vapor causing lack of transparency of the air b : a cloudy appearance in a transparent liquid or solid; also : a dullness of finish (as on furniture)
2 : something suggesting atmospheric haze; especially : vagueness of mind or mental perception

maze

mate - sex for animals

mare (Any of the large dark plains on the surface of the Moon, or any similar area on Mars.)

care - like me for my family LOL

rare

dare

dale

tale

ale

male