Good website for sutta learning?
There are a few others that I know of too ...

http://www.themindingcentre.org/dharmafarer/
http://www.buddha-vacana.org/
https://obo.genaud.net/
https://84000.co/

... see also English (or other European) translations of Pali Canon (plus various books).
IMO the (translated) English words change (from one translation to the next), because a word of Pali might have a (narrow or broad) range of meanings, which might be translated (more or less well) by any of several English words.

I tend to use Ven. Sujato's translations, for example:

Go to https://suttacentral.net/sn56.11/en/sujato
Click on Setting (the gear-wheel icon) near the top of the page
Enable &quot;View original text with translation&quot; (e.g. &quot;Line by line&quot;), and &quot;Activate Pali word lookup&quot;

Then you see the (original) line of Pali next to each (translated) line of English.



You can hover (with the mouse, unless you're using a touch-screen) over a word of Pali, to see a popup translation/definition:



And click on the title word in that popup to go to the dictionary definition:

https://suttacentral.net/define/viharati

Eventually you get to recognise various words of Pali, which then have a meaning of their own to you. You'll notice on this site that people slip words of Pali into their text -- dukkha, dhamma, and so on -- because that's less confusing than using several different English translations for the same thing.

You can see the same happening in http://www.buddha-vacana.org/sutta/samyutta/maha/sn56-011.html -- i.e. the text on the right includes some Pali words untranslated, but you can hover or click on them for dictionary/glossary support.
The &quot;Resources&quot; on this site (see the navigation menu on the left side the home page) are a gentle introduction to some Pali words and phrases.

Piya Tan's (i.e. Dhammafarer) is interesting too what you want to study and not just read a sutta: because for some suttas he has written commentary; and read commentary (traditional and from modern authors) which he might summarise; and cross-references with other suttas, footnotes, etc.

I like the Search function on Access to Insight -- Access to Insight doesn't include all the suttas but it does include:

Essays by various authors (which a Search may find)
Some reference material (collections of sutta extracts) which I like, for example, A Path to Freedom -- A Self-guided Tour of the Buddha's Teachings.
Beginnings -- Suggested Entry Points to this Website.