hawk vs clear the throat

hawk is a noun but clear the throat is not a noun.

Word	Noun	Adjective	Verb	Adverb
hawk	Yes	No	Yes	No
clear the throat	No	No	Yes	No

As verbs, hawk and clear the throat are synonyms defined as:

hawk (noun)	clear the throat (noun)
diurnal bird of prey typically having short rounded wings and a long tail
a square board with a handle underneath; used by masons to hold or carry mortar
an advocate of an aggressive policy on foreign relations

hawk (verb)	clear the throat (verb)
clear mucus or food from one's throat	clear mucus or food from one's throat
hunt with hawks
sell or offer for sale from place to place