Kind of curious what words you ended up going for.
do, maycopy, zap, swap, buryd, cat, between (you can define head ((1) (1) between) and behead ((2) (99) between) easily, so there's no reason to use anything else), same (or equivalent? pretty sure any of like replace or the substring searches can pull it off too) are all seemingly obvious choices, but it feels like nothing else should actually be necessary and making everything is awful. or is it possible to go without even all of those (or equivalent that ends up being the same amount of words)? I also haven't unlocked all the words yet, so there might be something useful in the later ones that can replace multiple of these.
Or some weird behavior you can't replicate using these somehow; I haven't made all the earlygame words either, since I was too lazy to work on fundimentals and just wanted to find the silliest solutions to the words that don't use loops... but I'll probably have to give this a go sometime. Or I might've just forgotten some behaviors you need that are pretty obviously not replicable with that list (I added the Same equivalent in an edit lol)