the oa sound like in croak

oa

ow

o

o_e

boat

moat

oat

oats

coat

goat

gloat

float

Owen

own

glow

sow

snow

Rowan

arrow

pillow

marshmallow

Chloe

so

coconut

Marco

Boh

Ronan

joke

joker

jokers

poke

hope

choke

cone

B

P

A

float

follow

rainbow

joke

explode

approach

croak

homework

tightrope

elbow

moaning

cockroach

owner

shadow

hormone

alone

slowest

envelope

goat

glowing

joking

slow

croaking

gloating

hope

hoping

ownership

shallow

marshmallow

overshadow