magnetic field strength vs magnetic flux density

magnetic field strength and magnetic flux density both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnetic field strength	Yes	No	No	No
magnetic flux density	Yes	No	No	No

As nouns, magnetic field strength and magnetic flux density are synonyms defined as:

magnetic field strength and magnetic flux density: the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow

Other synonyms of magnetic field strength include magnetic induction, magnetic intensity.

magnetic field strength (noun)	magnetic flux density (noun)
the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow	the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow