row vs difference of opinion

row and difference of opinion both are nouns.

Word	Noun	Adjective	Verb	Adverb
row	Yes	No	Yes	No
difference of opinion	Yes	No	No	No

As nouns, difference of opinion is a hypernym of row; that is, difference of opinion is a word with a broader meaning than row:

Other hypernyms of row include conflict, difference, dispute.

row (noun)	difference of opinion (noun)
the act of rowing as a sport	a disagreement or argument about something important
(construction) a layer of masonry
a continuous chronological succession without an interruption
an arrangement of objects or people side by side in a line
a linear array of numbers, letters, or symbols side by side
a long continuous strip (usually running horizontally)
an angry dispute

row (verb)	difference of opinion (verb)
propel with oars