https://perfect-english-grammar3.teachable.com/courses/b1-membership-redirect/lectures/19156208
Lesson 5: 'The' with abstract nouns | Perfect English Grammar
Complete intermediate English grammar course for serious learners of English - also available as part of our membership
abstract nounslessonperfectenglishgrammar
https://www.answers.com/natural-sciences/What_are_two_abstract_nouns_and_two_concrete_nouns
What are two abstract nouns and two concrete nouns? - Answers
Abstract nouns:educationtroubleConcrete nouns: elevatortree
abstract nounstwoconcreteanswers
https://simple.wikibooks.org/wiki/English/Nouns/Abstract_Nouns
English/Nouns/Abstract Nouns - Wikibooks
english nounsabstractwikibooks
https://scholarshare.temple.edu/entities/publication/c3d57d60-f2ac-436b-a611-c0c4c1adbbfa
Clustering, hierarchical organization, and the topography of abstract and concrete nouns
The empirical study of language has historically relied heavily upon concrete word stimuli. By definition, concrete words evoke salient perceptual associations...
and theclusteringhierarchicalorganizationtopography