This study makes an attempt to investigate the correlations between manifold aspects, namely both syntagmatic and paradigmatic relations, the four major derivative word forms, which represented morphological knowledge, six dimensions of analytic relations (i.e. component-integral, member-collection, portion-mass, stuff-object, feature-activity, and place-area) of vocabulary depth knowledge and academic reading comprehension among English as a Foreign Language learners at tertiary level. To this end, ninety one students from three departments of Business school and sixty four Engineering students (two departments) took part voluntarily in three depth of vocabulary knowledge tests and one reading comprehension test, which consisted of three reading passages with followed multiple choice questions. Results showed that firstly, analytic relations, which represented depth of vocabulary knowledge was positively and significantly correlated with reading comprehension. In other words, those students who gained more analytical relations (part-whole) knowledge performed better in reading comprehension than students with morphological knowledge and syntagmatic and paradigmatic relations, which represented depth of vocabulary knowledge. Secondly, students who had more paradigmatic (synonyms) relation knowledge performed better in reading comprehension than those who had syntagmatic relation (collocations), one of the two subtests of vocabulary depth knowledge test. Thirdly, the four major derivational word forms, i.e. noun, verb, adjective, and adverb were positively and either strongly or moderately correlated with dependent variable, academic reading comprehension. Fourthly, except one aspect of analytic relations, i.e. stuff-object analytic relations aspect, the rest of other five dimensions of analytic relations, namely component-integral, portion-mass, member-collection, place-area, and feature-activity analytic relations facets were positively and either strongly or moderately correlated with dependent variable, academic reading comprehension.