Individual pangram lists for words of lengths 12-letter, 13-letter, 14-letter, and 15-letter

Question

9 letter.

Molybdate Jarovized Squawfish Pickaxing.

10 letter.

Jackknifed Squeezable Playwright Overmixing.

11 letter.

Squawfishes Platemaking Objectivity Deoxidizers.

Now, I'm looking for four more pangrams for wordlengths 12, 13, 14, and 15.

To be clear as clear can be, each list should have only one word length; don't mix and match. This can prove a challenge when certain roots don't exist in specific lengths. EX: stem JUKEBOX or even the simplified JKBX exists in a 7-letter word (Jukebox) and a 9-letter word (Jukeboxes), but not an 8-letter word.

I love data! If you get multiple results, post them all. Don't care if it's 20 lists or 400.

Can any of them reduce to 3 words? A 15-letter list three words long would already be 45 letters; four words long reaches 60. Of course, it's not just length, but coverage of uncommon letters across a small set of single words, such as VQZ of Ventriloquizes (14), CPFX of Ciprofloxacin (13), and CHQ of Discotheques (12).

Answer 1

Via integer linear programming (specifically, set covering), here are the minimum numbers of (YAWL) words to cover every letter at least once:

12:

{'CHEQUERWORKS','EXEMPLIFYING','KATZENJAMMER','OBJECTIVIZED'}

13:

{'JAWBREAKINGLY','PHOTOOXIDIZES','QUALIFICATIVE','VANQUISHMENTS'}

14:

{'JUXTAPOSITIONS','MULTIFREQUENCY','SWASHBUCKLINGS','VENTRILOQUIZED'}

15:

{'DERMATOGLYPHICS','DETOXIFICATIONS','OBJECTIVIZATION','QUICKWITTEDNESS'}