Seven letter words with third letter L:
abrisaegisallisantisaphisapsisarrisarsisaspisaurisbasisbenisbreiscadiscamiscedischaiscutisdalisdarisdefisdelisdiviseprisetuisfenisfinisfujisgadisgirisgleishafishajishelishokisiiwisimpisintisjariskadiskakiskaliskamiskatiskaziskepiskiwiskojiskurislabislapislarislenislevislewislexislorislouislweislysismalismanismavismaxismerismetismidisminismitismokismunismutisnabisnarisnazisnelisnorisoasisornisorrispadisparispavispenisperispikispilispipispolispubispulispurispyxisqadisquaisrabisragisrakisramisranisrojisrotissadissakissarissatissemisshrissimissirissunissylistabistakistamistapistaxistikistipistitistopistroisuglisunaisvalisvleiswadiswaliswilisyagisyetisyogisyoniszariszatiszitiszoris
The word with the most L's that i can think of is 'illegally.'
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -I--LS-. That is, seven letter words with 2nd letter I and 5th letter L and 6th letter S. In alphabetical order, they are: divulse
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -A-LS--. That is, seven letter words with 2nd letter A and 4th letter L and 5th letter S. In alphabetical order, they are: nailset
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A---LS-. That is, seven letter words with 1st letter A and 5th letter L and 6th letter S. In alphabetical order, they are: appulse
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern I---LS-. That is, seven letter words with 1st letter I and 5th letter L and 6th letter S. In alphabetical order, they are: impulse insulse
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern A--LS--. That is, seven letter words with 1st letter A and 4th letter L and 5th letter S. In alphabetical order, they are: avulsed avulses
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern R---LS-. That is, seven letter words with 1st letter R and 5th letter L and 6th letter S. In alphabetical order, they are: repulse
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -G---LS. That is, seven letter words with 2nd letter G and 6th letter L and 7th letter S. In alphabetical order, they are: agnails
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -X--LS-. That is, seven letter words with 2nd letter X and 5th letter L and 6th letter S. In alphabetical order, they are: expulse
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -M--LS-. That is, seven letter words with 2nd letter M and 5th letter L and 6th letter S. In alphabetical order, they are: impulse
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern E---LS-. That is, seven letter words with 1st letter E and 5th letter L and 6th letter S. In alphabetical order, they are: expulse