Sometimes the vowel is like in “for”

angora

borax

borer

boring

caloric

emporium

fedora

glory

goring

gory

ivory

forum

Gloria

flora

scorer

snoring

corer

adorable

boron

explorer

moron

pakora

poring

porous

quorum

torah

Tories

story

storey

Sometimes it’s not

agora

allegory

amatory

amoral

amorous

anorak

anorexic

auditory

Balmoral

borage

borrow

calorie

category

chicory

coral

corolla

corona

coroner

corral

correct

corridor

corrode

corrupt

deforest

diaspora

diorama

factory

floral

florid

forage

foray

forest

horrid

horror

lorry

memory

moral

morass

oracle

oral

orangutan

orator

Orient

origin

sorrel

sorrow

sorry

theory

worry