According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 43 words with the pattern L--G--S. That is, seven letter words with 1st letter L and 4th letter G and 7th letter S. In alphabetical order, they are:
laagers
laggens
laggers
laggins
langars
langers
langues
langurs
laogais
largens
largess
leagues
ledgers
leggers
leggins
leigers
lengths
lidgers
liegers
liggers
lingams
lingels
lingers
lingles
lingoes
lingots
linguas
lodgers
loggats
loggers
loggets
loggias
longans
longers
longies
luggers
luggies
lungans
lungees
lungers
lungies
lungyis
lurgies
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 9 words with the pattern L-G--R-. That is, seven letter words with 1st letter L and 3rd letter G and 6th letter R. In alphabetical order, they are:
laggard
laggers
leggers
leghorn
legwork
liggers
loggers
luggers
lugworm
Some suggestions:
lancing
lasting
leaking
leaning
leaving
leering
looking
looping
lulling
lurking
Some seven letter words with the configuration "PR--O-N: are:prenoonpronoun
Some seven letter words with the configuration "PR-N--N" are:prenoonpronoun
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern IA-----. That is, seven letter words with 1st letter I and 2nd letter A. In alphabetical order, they are: iambics iambist
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A-A---I. That is, seven letter words with 1st letter A and 3rd letter A and 7th letter I. In alphabetical order, they are: acanthi
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A--I--I. That is, seven letter words with 1st letter A and 4th letter I and 7th letter I. In alphabetical order, they are: anziani
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-A--A-. That is, seven letter words with 1st letter I and 3rd letter A and 6th letter A. In alphabetical order, they are: inangas
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-I--I-. That is, seven letter words with 1st letter I and 3rd letter I and 6th letter I. In alphabetical order, they are: idiotic
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern A-----F. That is, seven letter words with 1st letter A and 7th letter F. In alphabetical order, they are: approof
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-----F. That is, seven letter words with 1st letter I and 7th letter F. In alphabetical order, they are: infeoff
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern I-IA---. That is, seven letter words with 1st letter I and 3rd letter I and 4th letter A. In alphabetical order, they are: iliacus
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern I---A-A. That is, seven letter words with 1st letter I and 5th letter A and 7th letter A. In alphabetical order, they are: ikebana intrada
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern IA--I--. That is, seven letter words with 1st letter I and 2nd letter A and 5th letter I. In alphabetical order, they are: iambics iambist