Seven letter words change one or two letter to make a new word

barbell

belabor

Belarus

Lazarus

sultana

suntans

stanzas

Stannis

Appropriate for Father’s Day: http://starecat.com/content/wp-content/uploads/number-1-dad-best-dad-mug-stannis-baratheon-daughter-killed-game-of-thrones.jpg

sustain

tannins

instant

tainted

detente

entente

tontine

notions

emotion

potions

portion

porting