landlubber vs tiro

landlubber and tiro both are nouns.

Word	Noun	Adjective	Verb	Adverb
landlubber	Yes	No	No	No
tiro	Yes	No	No	No

As nouns, tiro is a hypernym of landlubber; that is, tiro is a word with a broader meaning than landlubber:

Other hypernyms of landlubber include beginner, initiate, novice, tyro.

landlubber (noun)	tiro (noun)
an inexperienced sailor; a sailor on the first voyage	someone new to a field or activity
a person who lives and works on land