Protozoa and Phylum

Protozoa noun - In some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers.

Phylum and protozoa are semantically related. In some cases you can use "Phylum" instead a noun "Protozoa".

Phylum noun - (biology) the major taxonomic group of animals and plants; contains classes.

Protozoa and phylum are semantically related. Sometimes you can replace term "Protozoa" with "Phylum", this nouns are similar.