As nouns the difference between regnum and tregnum
is that regnum is a rank in the classification of organisms, also known as kingdom while tregnum is a bottle of wine in the port wine trade containing 2.25 liters of fluid, three times the volume of a standard bottle.
regnum
English
Noun
(en-noun)
(biology, taxonomy) A rank in the classification of organisms, also known as kingdom
Synonyms
* kingdom
----
tregnum
English
Noun
(
en noun)
(rare) A bottle of wine in the port wine trade containing 2.25 liters of fluid, three times the volume of a standard bottle.
Synonyms
*Marie Jeanne
*tappit hen