landsman vs tyro

landsman and tyro both are nouns.

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

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

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

landsman (noun)	tyro (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