Several philosophers also were of this opinion that only CONCEPTS of WAHI were transmitted by Allah & the words were coined by Muhammad (SA).This idea carries no weightage in the light of the latest discoveries of philosophy & lexicon . No concept can be generated unless it has words in existence. This is now an established truth that no idea/concept/meaning without word & no word without concept is possible . Word & its meaning are inescapable for a sensible person.The concept & word are simultaneously generated & thus every word has a concept & every concept has a word.
We can't separate the both.( "Consciousness " by Dr Bucke )This is an evidence for validating Quranic claim which was revealed with concepts & words both & not merelY concepts as erroneously claimed by several Muslim scholars as well.
Iqbal has beautifully solved this mystery ;Irtibat e Harf o Mani Irtibat e jan o tan : Jaisay Akhgar qaba posh apni khakistar main hay .