Lots of good options:

Bourgeoisie

Booboisie

Cramoisie

Fantasie

Jalousie

Unsonsie

Brassie

Cutesie

Floosie

Flossie

Footsie

Glassie

Poussie

Primsie

Prossie

Tootsie

Dassie

Donsie

Falsie

Gawsie

Gussie

Lassie

Newsie

Popsie

Potsie

Sonsie

Tassie

Cosie

fair fa' your honest sonsie face: fair full your honest jolly face

great chieftain o' the pudden-race: great cheft of the sausage race

aboon them a' you tak your place: above them all you take your place

painch tripe or therm: stomach intestine and heart

weel are you wordy o' a grace: well are you worthy of a grace

as Lang's my arm: as long as my arm

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern S-N-IE. That is, six letter words with 1st letter S and 3rd letter N and 5th letter I and 6th letter E. In alphabetical order, they are:

sannie

sonsie

sunkie

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 9 words with the pattern -ON-IE. That is, six letter words with 2nd letter O and 3rd letter N and 5th letter I and 6th letter E. In alphabetical order, they are:

bonnie

bonxie

condie

donsie

honkie

pontie

ronnie

sonsie

yonnie

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 26 words with the pattern S---IE. That is, six letter words with 1st letter S and 5th letter I and 6th letter E. In alphabetical order, they are:

saltie

sannie

sarmie

sarnie

saulie

seelie

selkie

shavie

sickie

silkie

skivie

soapie

softie

sonsie

soogie

sortie

soutie

spavie

specie

stimie

stogie

stylie

stymie

subbie

sunkie

surfie