top boot vs buskin

top boot and buskin both are nouns.

Word	Noun	Adjective	Verb	Adverb
top boot	Yes	No	No	No
buskin	Yes	No	No	No

As nouns, top boot and buskin are synonyms defined as:

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

top boot (noun)	buskin (noun)
a boot reaching halfway up to the knee	a boot reaching halfway up to the knee