My guess is lieu.
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duple, ruble
PRALINE
seven, level, never, refer, leper, merer, reset, feted, fever, fewer, newer, sewer, sever, revel, newel, sexed, hexed
Old age.
The word you're looking for is "clay." It has "l" as the third letter and "c" as the fourth letter. You're welcome.
The words with the form _L_O are also, alto, and oleo/olio.
utile
* Cuneal: having the shape of a wedge. * Luteal: relating to the stage of the menstrual cycle.
Idiots
labelleverlineslaneslibelloverliterlapellevellinen
The word is "seles".