maple 1 marble 3 mathematics 1 mean 2 medium 2 metal 5 murder 1 mush 1
nail 1 nails 1 natural 1 nut 1 nuts 1
oak 1 opaque 1
pavement 2 perplexing 1 physics 1 piano 1 principle 1 pulpy 1
quality 1 questions 1
raining 1 resistance 4 resistant 1 rigid 1 road 1 rock 38 rocks 4 rocky 1 rough 11
saltpetre 1 severe 1 sidewalk 1 smooth 15 soft 367 solid 15 stale 1 steel 14 stick 1 stingy 1 stone 102 stones 1 stony 1 stove 2 strength 1 strong 4 stuff 1 substance 6
table 5 tack 1 thick 1 tight 1 touch 2 tough 12 tree 2 trouble 1 turnip 1
unbreakable 5 uncomfortable 5 uneasy 1 unimpressionable 1 unpleasant 2 unpliable 1 unripe 1 unyielding 1 uselessness 1
very 1