avid, fond, agog
zest
That could be zeal or zest.
lemon --- zest
keen
enjoyment
It is keen
Kind, king, knit, kilo, kiln, knot, kilt, keep, keen, know.
king, kind, kill, kink, knob, knit, know, keep, keen, keel, kale.
keen
Some four letter words with 'e' as the second letter are: keen, neat, teen, meet, team, nets, sets, jets, deal, meal, seem, seam, and gems.
Avid
Agog, avid, keen
alert. avid, agog