Does the flap t rule apply to the d sound in General American pronunciation?

[alejandroczech]

I’ve been wondering whether the letter d in words like border, order, ordinary, according is pronounced as a flap t (water, better, party).

 

[dunchee]

I’d say yes. As a matter of fact, my (very old) New Oxford American Dictionary app gives the US IPA symbols of water, better, party as |ˌwɔdər| / |ˌwɑdər|, |ˌbɛdər| and |ˌpɑrdi|.

Also this fits what you ask:
Flap T: Really a D Sound? American English Pronunciation

Starts around [2:05], and at [2:38] “… both T and D sound between vowels, or after an R and before a vowel ...”

 

[SoothingDave]

I am thinking you have it backwards. These words with Ds in them are pronounced like Ds. It is the words with Ts (flap Ts) that are pronounced as if they were Ds.

 

[Tarheel]

Q: Do you pronounce the "t" in some words as if it was a "t"?
A: I suppose some do. However, I can't think of any words any words I do that with. For example, when I pronounce "water" it has a distinct "t" sound, thus: wah-TER. (The same with "better" and "party".

 

[jutfrank]

Here's a test for American speakers. Do you pronounce the following words in the same way?:

ladder
latter

 

[SoothingDave]

Yes.

 

[Tarheel]

@SoothingDave does.

 

[probus]

We in Canada do not.