According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern RI--N-S-. That is, eight letter words with 1st letter R and 2nd letter I and 5th letter N and 7th letter S. In alphabetical order, they are:

richness

rifeness

riminess

ripeness

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern R-FE-E--. That is, eight letter words with 1st letter R and 3rd letter F and 4th letter E and 6th letter E. In alphabetical order, they are:

refereed

referees

referent

rifeness

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern R--EN-S-. That is, eight letter words with 1st letter R and 4th letter E and 5th letter N and 7th letter S. In alphabetical order, they are:

rareness

rifeness

ripeness

rudeness

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 23 words with the pattern RI---E-S. That is, eight letter words with 1st letter R and 2nd letter I and 6th letter E and 8th letter S. In alphabetical order, they are:

richness

riddlers

rifeness

rifflers

riftless

rightens

righters

rimeless

riminess

rindless

ringless

ringlets

ripeners

ripeness

rippiers

ripplers

ripplets

riskless

riteless

rivaless

riverets

riveters

rivulets

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 38 words with the pattern --F---S-. That is, eight letter words with 3rd letter F and 7th letter S. In alphabetical order, they are:

afforest

buffiest

caffeism

cuffless

daffiest

daftness

deforest

deftness

enforest

fiftyish

fuffiest

giftless

heftiest

huffiest

iffiness

infamise

leftmost

lifeless

loftiest

loftless

miffiest

naffness

niffiest

niftiest

puffiest

refinish

reforest

rifeness

riftiest

riftless

safarist

safeness

softness

toffiest

tuftiest

weftwise

wifeless

wiftiest