landsman vs tiro

landsman and tiro both are nouns.

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

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

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

landsman (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