Consonants

• /l/ and /r/: rake / lake, lice / rice
• /p/ and /b/: cab / cap, pull / bull
• /θ/ and /f/ or /s/ or /t/: three / tree / free, thin / sin / fin /

Currently being developed

• /s/ and /sh/: push / puss,
• /ch/ and /dj/: cello / jello, chest/ jest

• /v/ and /b/: berry / very, bat / vat
• /v/ and /w/: vine / wine, vain / Wayne, twelve
• /v/ and /f/: fan / van, fee / V

• /ð/ and /z/ or /d/: with/ wizz, then/ Zen, den