The dictionary.com definitions seem to overlap almost completely.
swollen, or affected with swelling, as a part of the body.
pompous or inflated, as language; turgid; bombastic.
seeming to swell; bulging.
swollen; distended; tumid.
inflated, overblown, or pompous; bombastic: turgid language.
swelling; slightly tumid.
exhibiting or affected with many ideas or emotions; teeming.
pompous and pretentious, especially in the use of language; bombastic.
The only differences I inferred from the definitions are that when it comes to literally swelling, tumescent might refer to a less extreme case than the other two, and that tumescent might be possible to use with a neutral or positive connotation. But these are both speculation on my part.
What I would like to know is:
Is my above speculation correct?
If I were referring to literal swelling, what are the different connotations of the words (e.g. in the sentence "His foot was [blank] enough to be alarming.")?
If I am referring to bombastic language, what are the different connotations (e.g. in the sentence "The arrogant professor's [blank] lecture left us feeling annoyed.")?