Arpan, note that for it to be a synonym, the part of speech should be the same. So heir would be correct for inheritor but inherit wouldn’t. Hence steal is not acceptable for stealthy, neither is jolly for jollity or nourish for nourished (anyway, differently inflected forms of the same word hardly count! 🙂 They would make it too easy…)
CAT-holics 
Round
Jolly
Offer
Seal (not sure)
Wind
Equal
Fragile
Heir
Rise (just a guess, couldn’t think of anything else)
Minute
Sue
Road
Rot
Taint
🙂
Mostly right, Diana 🙂 3 missed and one slightly off (wrong part of speech!)
regards
J
ROTUND – ROUND
JOLLITY – JOLLY
PROFFER – OFFER
STEALTHY – STEAL
ENTWINED – WIND
EQUATABLE – EQUAL
FRANGIBLE – FRAGILE
INHERITOR – INHERIT/HEIR
NOURISHED – NOURISH
DIMINUTIVE – MINUTE
PROSECUTE – SUE
PROMENADE – PROM
DETERIORATE – DERATE
CONTAMINATE – TAINT
Arpan, note that for it to be a synonym, the part of speech should be the same. So heir would be correct for inheritor but inherit wouldn’t. Hence steal is not acceptable for stealthy, neither is jolly for jollity or nourish for nourished (anyway, differently inflected forms of the same word hardly count! 🙂 They would make it too easy…)
regards
J
Ok! My Bad, sorry!
ROTUND=ROUND
JOLLITY=JOY
PROFFER=OFFER
STEALTHY=SLY
ENTWINED=TIED
EQUITABLE=EQUAL
FRANGIBLE=FRAGILE,FRAIL
INHERITOR=HEIR
NOURISHED=NURSED
DIMINUTIVE=MINUTE
PROSECUTE=SUE
PROMENADE=ROAD
DETERIORATE=DIE,ROT
CONTAMINATE=TAINT
Perfectly correct, Sulagna… 🙂
regards
J