Minimal pair: Vowel 6, /ɒ/, versus null, 46 pairs
As /0/ is a short vowel, it does not appear in an open syllable, which means that the contrast is either from a deleted initial, such as occult/cult or /fish, or from a closed syllable whose consonants permit clusterings, such as follow/floe or soppier/spear.
In both cases, an unstressed component moves up to acquire stress, so that the contrast is not strictly minimal.
There are 33 semantic contrasts in the list, giving a semantic loading of 71%.
borage bridge
chaos case
colic click
colleen clean
colleens cleans
collier clear
colliers clears
follow floe
follows floes
follow flow
followed flowed
following flowing
follows flows
forage fridge
forages fridges
foray fray
forayed frayed
foraying fraying
forays frays
forays phrase
Nicole nickel
occult cult
oddity ditty
oddities ditties
offish fish
olive live
olives lives
Oliver liver
onyx nicks
onyx nix
opposition position
orison risen
oryx ricks
oryx wricks
Ossett sit
otter to
rayon rain
rayon reign
rayon rein
repot reaped
socket skit
sockets skits
solid slid
Sonia sneer
sonic snick
soppier spear