It can be either
plural word is phenomena singular is phenomenon
Staff, as in "This office space is big enough for a staff of fifty," or "Most of the staff usually go to the corner bar after work," is a SINGULAR noun.
The plural form of staff is staffThe plural of staff is either staffs or staves. Most meanings of the word will accept both forms, but the plural of the musical staff is always staves, while the plural of the personnel staff is always staffs.
The word team is singular; the plural form is teams.
These is plural, this is singular
Lance is singular. Lances is plural.
It can be either: the word staff is a collective term for a group. The common US usage is the singular "has." The common UK usage is the plural "have." When using staff to mean the individual members of the staff, without using the word members, the plural verb is sometimes correct: e.g. The staff have their own parking spaces.
"Financial stability" is two words ;) The phrase is singular.
Saving and Savings are both different words with totally different meanings. Neither word has a plural.
Every is an adjective and adjectives don't have plural forms. The words plural or singular are only used to describe nouns, not adjectives.
Yes, "lyric" can refer to a single set of words in a song or poem (singular) or to multiple sets of words (plural). For example, "The lyric of this song is beautiful" (singular) and "The lyrics of these songs are catchy" (plural).
The word 'Phenomenon' is singular. The plural form is 'Phenomena'.