wave front vs propagation

wave front and propagation both are nouns.

Word	Noun	Adjective	Verb	Adverb
wave front	Yes	No	No	No
propagation	Yes	No	No	No

As nouns, propagation is a hypernym of wave front; that is, propagation is a word with a broader meaning than wave front:

wave front (noun)	propagation (noun)
(physics) an imaginary surface joining all points in space that are reached at the same instant by a wave propagating through a medium	the act of producing offspring or multiplying by such production
all the points just reached by a wave as it propagates	the spreading of something (a belief or practice) into new regions
	the movement of a wave through a medium