English is weird.
A directional coupler can be used as
a return loss bridge.
A directional coupler can be used as
an RLB.
A horse. An hotel. (Because it's from French and soft to non-existant h).
Adjective order. A long red dress. Never a red long dress. Native English speakers don't even realise there is rule. Others may have to learn.
Any "English" grammar or spelling rule historically taught to juniors has so many exceptions it's criminal how they used to teach. One of the few that's mostly true (the author mentions that sometimes the "rule" is broken, and why that might be.:
https://www.grammarly.com/blog/adjective-order/
Yet rarely taught in the past in UK/Ireland. No idea what they teach now. The "and" tip to see if a comma is needed is good.
Also subtle differences USA and non-USA beyond Webster's spelling reform or even volcabulary (muffler vs silencer). The article may be left out in USA but never elsewhere on some sentences, but I've no idea how the USA decides. USA may drop plurals in abbreviations such as Mathematics to Maths (USA is Math).
Some things have grey areas such as digits vs spelling for numbers (but never spell in full telephone numbers, credit cards and house numbers). Spelling ages is common, with a hyphen like thirty-seven, because it used to be seven and thirty years old.
Commas are the most wicked invention.