fixed costs vs fixed charge

fixed costs and fixed charge both are nouns.

Word	Noun	Adjective	Verb	Adverb
fixed costs	Yes	No	No	No
fixed charge	Yes	No	No	No

As nouns, fixed costs and fixed charge are synonyms defined as:

fixed costs and fixed charge: a periodic charge that does not vary with business volume (as insurance or rent or mortgage payments etc.)

Other synonyms of fixed costs include fixed cost.

fixed costs (noun)	fixed charge (noun)
a periodic charge that does not vary with business volume (as insurance or rent or mortgage payments etc.)	a periodic charge that does not vary with business volume (as insurance or rent or mortgage payments etc.)