Collocations for soft - adj.

be, feel, look
become, get, go, grow, turn
stay
Her skin had stayed soft and supple.

extremely, fairly, very, etc.
beautifully, incredibly, wonderfully
The fabric has a beautifully soft texture.

all
These tomatoes have gone all soft.

relatively
a little, slightly, etc.

Soft is used with these nouns:
bed, blanket, breeze, brown, brush, caress, carpet, centre, chair, cheek, cheese, chuckle, clay, click, cloth, coal, colour, consistency, contact lens, cotton, couch, cover, cry, curl, curve, cushion, dirt, dough, drawl, drink, drug, earth, eye, fabric, feature, flesh, focus, fold, footstep, fruit, fur, glow, goal, grass, groan, ground, growl, grunt, hand, heart, hiss, hum, kiss, knock, landing, laugh, laughter, launch, leather, light, lighting, linen, margarine, material, mattress, melody, metal, moan, money, moonlight, mouth, mud, murmur, music, option, palate, palm, passage, patch, pencil, pillow, pornography, rain, ray, rock, roll, rumble, rustle, sand, scent, shade, sheet, shoe, sigh, silk, skin, snow, sob, sofa, sound, splash, surface, swell, tap, target, texture, thud, thump, tinkle, tissue, tone, towel, toy, tread, turf, velvet, voice, water, whimper, whisper, wire, wood, wool, word