Intertwined Words

I regularly play Word Master on my iPhone that requires one word to be linked to another by at least one letter. I got to thinking of pairs of words that link completely.

For two letters words, it's rather trivial. For example:

B A

E N

For three letter words, it's also not difficult. For example:

R A T

E T A

As the words get longer, the match-ups become more difficult but still possible for four letter words. For example:

T O R E

A R E A

Of course, looking at the previous example, you might accept TA, OR and RE as legitimate words but what about EA? Well, we need to agree on some reference source and the SCRABBLE DICTIONARY is as good a source as any. Referring to this we find that EA is indeed a word. 

EA: the Babylonian god of wisdom; son of Apsu and father of Marduk; counterpart of the Sumerian Enki; as one of the supreme triad including Anu and Bel he was assigned controlof the watery element.

What about a five letter match-up? It can be noted that alternating between vowels and consonents makes the match-ups easier to find. Difficult consonants, like C and V are to be avoided at all costs become there are very few two letter words to be formed from them.

 B A K E D
A B A T E

BA, AB, KA, ET and DE are all legitimate words according to the SCRABBLE DICTIONARY. What about a six letter match-up?

A B A T E D
D E N O T E

It's not that difficult but watching three words together would be more challenging. Anyway, just introducing the notion of "intertwined words" (for want of a better term).