desert boot vs combat boot

desert boot and combat boot both are nouns.

Word	Noun	Adjective	Verb	Adverb
desert boot	Yes	No	No	No
combat boot	Yes	No	No	No

As nouns, desert boot and combat boot are synonyms defined as:

Other synonyms of desert boot include buskin, half boot, top boot.

desert boot (noun)	combat boot (noun)
a boot reaching halfway up to the knee	a boot reaching halfway up to the knee
	A type of heavy leather lace-up boot adopted mainly by heavy metal, punk and goth subcultures; comes in different colors and heights which are measured in the number of eyelets.