These are from a different list. No winners yet found.

adit
n.
5L aditus, pp. of adire, to approach < ad3, to + ire, to go: see EXIT6 an approach or entrance; specif., an almost horizontal passageway into a mine


adnexa
n.pl.
5ModL < L, neut. pl. of adnexus < adnectere: see ANNEX6 Anat. accessory parts or appendages of an organ !the ovaries are adnexa of the uterus"
ad[nex$al
adj.


adnae
adj.
5< L adnatus, pp. of adnasci, to be born < ad3, to + nasci: see GENUS6 Biol. congenitally joined together: said of unlike parts
ad[na4tion
n.

adumbrate
vt.
3brat#ed, 3brat#ing 5< L adumbratus, pp. of adumbrari, to shade < ad3, to + umbra, SHADE6
1 to outline in a shadowy way; sketch
2 to suggest beforehand; foreshadow in a vague way
3 to obscure; overshadow
ad#um[bra4tion 73bra4*!n8
n.
ad[um4bra[tive 73br! tiv8
adj.
ad[ven[ti[ti[a 7ad#ven ti*4!, 3ti*4c !; 3v!n38
n.
5M odL < L, for adventicia, neut. pl. of adventicius: see fol.6 the outer covering of an organ, as of an artery: it is made up chiefly of connective tissue


aecium
n.,
pl. 3ci[a 73!8 5ModL < Gr aikia, injury6 a cuplike spore fruit produced in spring by certain rust fungi
ae$ci[al
adj.

Adit's a word known to any cruciverbalist.

yup. wouldn't be worth much in Scrabble®.

worth much in Scrabble®.

Not per se, but I could see its being a good building block for later development.