reading vs browsing

reading and browsing both are nouns.

Word	Noun	Adjective	Verb	Adverb
reading	Yes	No	No	No
browsing	Yes	No	No	No

As nouns, browsing is a hyponym of reading; that is, browsing is a word with a more specific, narrower meaning than reading:

reading: the cognitive process of understanding a written linguistic message
browsing: reading superficially or at random

Other hyponyms of reading include speed-reading, perusal, perusing, poring over, studying, browse, skim, skimming.

reading (noun)	browsing (noun)
the act of measuring with meters or similar instruments	the act of feeding by continual nibbling
the cognitive process of understanding a written linguistic message	reading superficially or at random
a mental representation of the meaning or significance of something
a datum about some physical state that is presented to a user by a meter or similar instrument
written material intended to be read
a particular interpretation or performance
a public instance of reciting or repeating (from memory) something prepared in advance