I hesitate to say so, but this came to me in a dream last night, so I felt that was significant enough to go ahead and post this. There may be similar threads but I haven’t tried to locate them. Treat this as a game or a challenge or a way to kill some time, but see if you can top what’s been posted already, assuming something is.
The basic idea is to come up with word groups that consist of standard spellings of relatively common (not archaic) words that differ only in the vowels employed. Include w and y vowels if they apply.
A sample: last lest list lost lust
Finding a group with double vowels (may be tough) would be great, or multi-syllable words, or some other standout feature.
If a word gets close to being “common” and can at least be found in a “collegiate” (or better) dictionary, go ahead and use it.
Participants in the thread may vote on which group is “the best” once we have some to consider.