unnatural
Some four letter words ending in L are:ballbellbillboilbullcallcellcoilcoolcurlearlfailfallfeelfellfillfoilfoolfoulfowlfullgallgoalgillgullhallhailheelhellhillhulljelljailjowlkeelkilllolllullmallmailmealmillmoilmullnailnullpailpallpeelpillpollpoolpurlrailreelrollsailsealsellsillsoiltailtalltealtelltoiltooltollveilwailwallwealwellwillyellzeal
I can think of several.
Arrival, alcohol
shawl
compelconsulcorralcarnal
wonderful
One such word is essential.
"Lucky" is a five letter word beginning with l
Some four letter words ending in L are:ballbellbillboilbullcallcellcoilcoolcurlearlfailfallfeelfellfillfoilfoolfoulfowlfullgallgoalgillgullhallhailheelhellhillhulljelljailjowlkeelkilllolllullmallmailmealmillmoilmullnailnullpailpallpeelpillpollpoolpurlrailreelrollsailsealsellsillsoiltailtalltealtelltoiltooltollveilwailwallwealwellwillyellzeal
literal
That's wonderful.
I can think of several.
Arrival, alcohol
ancestralbeautifulcongenialcontinualdeceitfulempiricalessentialfunctionalflavorfulgreenmailhealthfulimpartialmedicinalnocturnaloccipitalresentfulspiritualtriennialwonderful
shawl
tunnel funnel
glycol. school