Answer:
2 Down is intangible. 
4 Down is oyster fork 
8 Down 
try the ones I have listed below
Good manners, social graces, breeding, civility, consideration, courtesy, decorum elegancies etiquette formalities manners mores polished manners politeness, proper conduct, protocol, savoir, tact
Explanation:
You can't touch this word — it is intangible. ... The Latin verb tangere means "to touch," and the 16th-century English word tangible comes from it. Something intangible can't be touched physically, but most of the time it is understandable or even felt in the heart.