recap vs recap is definitely a distinction that shows up in my western canadian speech patterns. Absent is a pretty subtle difference.

I suspect a lot of these vary with regional accents.

The stress difference on cushion is there, but it's very faint. Absent and recap aren't really ever used as direct verbs that I've heard.

E.g. "I am going to be absent" and "I am going to recap you on this" (or really the more natural "I'll give you a recap" where it is not used as a verb at all) is the most common form I hear in the US

"After this commercial break, we will recap the games from today, and discuss what we can expect going into tomorrow"

You can find more examples on ludwig.guru, for example.

The version of recap that has verb stress means to cap again. The shortened version of recapitulate ordinarily takes the stress on the first syllable. As for absent as a verb, it's rarely used in the present tense, though absented isn't all that uncommon ("I absented myself.").

“Let’s recap”?

It honestly sounds weird because it's not a word I use. I can't tell if 'rihcap' would sound right or not. "Review" is more in my purview.

I was going to comment the same thing. While many on the list follow the rule many other words listed I've heard only one pronunciation regardless noun and verb form. Maybe it's a regional thing. I speak American English, maybe these pronunciations are different elsewhere.

I've certainly heard "abSENT" in British English. The other two, not so much.

I absent myself from this discussion

Yes, that is indeed the verb, but I hear it as "I absent myself" and I can't remember ever hearing it otherwise. Maybe in the USA it's already entered this category and then gone even further and influenced the pronunciation of the verb.

American English speaker here, born and raised in Dallas, Tx. The stress goes on the second syllable for the verb for me ("I absent myself").

I’m UK-based (English, specifically) and definitely hear it on the second syllable in that usage

Odd, I speak bog-standard American English and if I abSENT myself from class I will be marked ABsent.

Though I would CUSHion a blow with a CUSHion, I would also say "to reCAP, I was just telling Bob that you missed the REcap".

Not for cushion, but I've heard the other two.

Invalid though two distinct nouns and not noun verb, isn’t listed here. I know there are others, just don’t recall at the moment.

"Cushion" is a particularly bizarre example, because even if speakers were to stress the second syllable when using it as a verb, it still wouldn't demonstrate initial-stress derivation. The noun "cushion" is not derived from the verb "cushion." It's the other way round. (Source: the Oxford English Dictionary, unfortunately behind a paywall.)